/*
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: google/cloud/retail/v2alpha/user_event.proto

package com.google.cloud.retail.v2alpha;

/**
 *
 *
 * <pre>
 * UserEvent captures all metadata information Retail API needs to know about
 * how end users interact with customers' website.
 * </pre>
 *
 * Protobuf type {@code google.cloud.retail.v2alpha.UserEvent}
 */
public final class UserEvent extends com.google.protobuf.GeneratedMessageV3
    implements
    // @@protoc_insertion_point(message_implements:google.cloud.retail.v2alpha.UserEvent)
    UserEventOrBuilder {
  private static final long serialVersionUID = 0L;
  // Use UserEvent.newBuilder() to construct.
  private UserEvent(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
    super(builder);
  }

  private UserEvent() {
    eventType_ = "";
    visitorId_ = "";
    sessionId_ = "";
    experimentIds_ = com.google.protobuf.LazyStringArrayList.EMPTY;
    attributionToken_ = "";
    productDetails_ = java.util.Collections.emptyList();
    cartId_ = "";
    searchQuery_ = "";
    filter_ = "";
    orderBy_ = "";
    pageCategories_ = com.google.protobuf.LazyStringArrayList.EMPTY;
    uri_ = "";
    referrerUri_ = "";
    pageViewId_ = "";
    entity_ = "";
  }

  @java.lang.Override
  @SuppressWarnings({"unused"})
  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
    return new UserEvent();
  }

  @java.lang.Override
  public final com.google.protobuf.UnknownFieldSet getUnknownFields() {
    return this.unknownFields;
  }

  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    return com.google.cloud.retail.v2alpha.UserEventProto
        .internal_static_google_cloud_retail_v2alpha_UserEvent_descriptor;
  }

  @SuppressWarnings({"rawtypes"})
  @java.lang.Override
  protected com.google.protobuf.MapField internalGetMapField(int number) {
    switch (number) {
      case 7:
        return internalGetAttributes();
      default:
        throw new RuntimeException("Invalid map field number: " + number);
    }
  }

  @java.lang.Override
  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
      internalGetFieldAccessorTable() {
    return com.google.cloud.retail.v2alpha.UserEventProto
        .internal_static_google_cloud_retail_v2alpha_UserEvent_fieldAccessorTable
        .ensureFieldAccessorsInitialized(
            com.google.cloud.retail.v2alpha.UserEvent.class,
            com.google.cloud.retail.v2alpha.UserEvent.Builder.class);
  }

  public static final int EVENT_TYPE_FIELD_NUMBER = 1;

  @SuppressWarnings("serial")
  private volatile java.lang.Object eventType_ = "";
  /**
   *
   *
   * <pre>
   * Required. User event type. Allowed values are:
   * * `add-to-cart`: Products being added to cart.
   * * `category-page-view`: Special pages such as sale or promotion pages
   *   viewed.
   * * `detail-page-view`: Products detail page viewed.
   * * `home-page-view`: Homepage viewed.
   * * `promotion-offered`: Promotion is offered to a user.
   * * `promotion-not-offered`: Promotion is not offered to a user.
   * * `purchase-complete`: User finishing a purchase.
   * * `search`: Product search.
   * * `shopping-cart-page-view`: User viewing a shopping cart.
   * </pre>
   *
   * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
   *
   * @return The eventType.
   */
  @java.lang.Override
  public java.lang.String getEventType() {
    java.lang.Object ref = eventType_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      eventType_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * Required. User event type. Allowed values are:
   * * `add-to-cart`: Products being added to cart.
   * * `category-page-view`: Special pages such as sale or promotion pages
   *   viewed.
   * * `detail-page-view`: Products detail page viewed.
   * * `home-page-view`: Homepage viewed.
   * * `promotion-offered`: Promotion is offered to a user.
   * * `promotion-not-offered`: Promotion is not offered to a user.
   * * `purchase-complete`: User finishing a purchase.
   * * `search`: Product search.
   * * `shopping-cart-page-view`: User viewing a shopping cart.
   * </pre>
   *
   * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
   *
   * @return The bytes for eventType.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getEventTypeBytes() {
    java.lang.Object ref = eventType_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      eventType_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int VISITOR_ID_FIELD_NUMBER = 2;

  @SuppressWarnings("serial")
  private volatile java.lang.Object visitorId_ = "";
  /**
   *
   *
   * <pre>
   * Required. A unique identifier for tracking visitors.
   * For example, this could be implemented with an HTTP cookie, which should be
   * able to uniquely identify a visitor on a single device. This unique
   * identifier should not change if the visitor log in/out of the website.
   * Don't set the field to the same fixed ID for different users. This mixes
   * the event history of those users together, which results in degraded model
   * quality.
   * The field must be a UTF-8 encoded string with a length limit of 128
   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
   * The field should not contain PII or user-data. We recommend to use Google
   * Analytics [Client
   * ID](https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#clientId)
   * for this field.
   * </pre>
   *
   * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
   *
   * @return The visitorId.
   */
  @java.lang.Override
  public java.lang.String getVisitorId() {
    java.lang.Object ref = visitorId_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      visitorId_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * Required. A unique identifier for tracking visitors.
   * For example, this could be implemented with an HTTP cookie, which should be
   * able to uniquely identify a visitor on a single device. This unique
   * identifier should not change if the visitor log in/out of the website.
   * Don't set the field to the same fixed ID for different users. This mixes
   * the event history of those users together, which results in degraded model
   * quality.
   * The field must be a UTF-8 encoded string with a length limit of 128
   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
   * The field should not contain PII or user-data. We recommend to use Google
   * Analytics [Client
   * ID](https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#clientId)
   * for this field.
   * </pre>
   *
   * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
   *
   * @return The bytes for visitorId.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getVisitorIdBytes() {
    java.lang.Object ref = visitorId_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      visitorId_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int SESSION_ID_FIELD_NUMBER = 21;

  @SuppressWarnings("serial")
  private volatile java.lang.Object sessionId_ = "";
  /**
   *
   *
   * <pre>
   * A unique identifier for tracking a visitor session with a length limit of
   * 128 bytes. A session is an aggregation of an end user behavior in a time
   * span.
   * A general guideline to populate the sesion_id:
   * 1. If user has no activity for 30 min, a new session_id should be assigned.
   * 2. The session_id should be unique across users, suggest use uuid or add
   * visitor_id as prefix.
   * </pre>
   *
   * <code>string session_id = 21;</code>
   *
   * @return The sessionId.
   */
  @java.lang.Override
  public java.lang.String getSessionId() {
    java.lang.Object ref = sessionId_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      sessionId_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * A unique identifier for tracking a visitor session with a length limit of
   * 128 bytes. A session is an aggregation of an end user behavior in a time
   * span.
   * A general guideline to populate the sesion_id:
   * 1. If user has no activity for 30 min, a new session_id should be assigned.
   * 2. The session_id should be unique across users, suggest use uuid or add
   * visitor_id as prefix.
   * </pre>
   *
   * <code>string session_id = 21;</code>
   *
   * @return The bytes for sessionId.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getSessionIdBytes() {
    java.lang.Object ref = sessionId_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      sessionId_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int EVENT_TIME_FIELD_NUMBER = 3;
  private com.google.protobuf.Timestamp eventTime_;
  /**
   *
   *
   * <pre>
   * Only required for
   * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
   * method. Timestamp of when the user event happened.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp event_time = 3;</code>
   *
   * @return Whether the eventTime field is set.
   */
  @java.lang.Override
  public boolean hasEventTime() {
    return eventTime_ != null;
  }
  /**
   *
   *
   * <pre>
   * Only required for
   * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
   * method. Timestamp of when the user event happened.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp event_time = 3;</code>
   *
   * @return The eventTime.
   */
  @java.lang.Override
  public com.google.protobuf.Timestamp getEventTime() {
    return eventTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : eventTime_;
  }
  /**
   *
   *
   * <pre>
   * Only required for
   * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
   * method. Timestamp of when the user event happened.
   * </pre>
   *
   * <code>.google.protobuf.Timestamp event_time = 3;</code>
   */
  @java.lang.Override
  public com.google.protobuf.TimestampOrBuilder getEventTimeOrBuilder() {
    return eventTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : eventTime_;
  }

  public static final int EXPERIMENT_IDS_FIELD_NUMBER = 4;

  @SuppressWarnings("serial")
  private com.google.protobuf.LazyStringList experimentIds_;
  /**
   *
   *
   * <pre>
   * A list of identifiers for the independent experiment groups this user event
   * belongs to. This is used to distinguish between user events associated with
   * different experiment setups (e.g. using Retail API, using different
   * recommendation models).
   * </pre>
   *
   * <code>repeated string experiment_ids = 4;</code>
   *
   * @return A list containing the experimentIds.
   */
  public com.google.protobuf.ProtocolStringList getExperimentIdsList() {
    return experimentIds_;
  }
  /**
   *
   *
   * <pre>
   * A list of identifiers for the independent experiment groups this user event
   * belongs to. This is used to distinguish between user events associated with
   * different experiment setups (e.g. using Retail API, using different
   * recommendation models).
   * </pre>
   *
   * <code>repeated string experiment_ids = 4;</code>
   *
   * @return The count of experimentIds.
   */
  public int getExperimentIdsCount() {
    return experimentIds_.size();
  }
  /**
   *
   *
   * <pre>
   * A list of identifiers for the independent experiment groups this user event
   * belongs to. This is used to distinguish between user events associated with
   * different experiment setups (e.g. using Retail API, using different
   * recommendation models).
   * </pre>
   *
   * <code>repeated string experiment_ids = 4;</code>
   *
   * @param index The index of the element to return.
   * @return The experimentIds at the given index.
   */
  public java.lang.String getExperimentIds(int index) {
    return experimentIds_.get(index);
  }
  /**
   *
   *
   * <pre>
   * A list of identifiers for the independent experiment groups this user event
   * belongs to. This is used to distinguish between user events associated with
   * different experiment setups (e.g. using Retail API, using different
   * recommendation models).
   * </pre>
   *
   * <code>repeated string experiment_ids = 4;</code>
   *
   * @param index The index of the value to return.
   * @return The bytes of the experimentIds at the given index.
   */
  public com.google.protobuf.ByteString getExperimentIdsBytes(int index) {
    return experimentIds_.getByteString(index);
  }

  public static final int ATTRIBUTION_TOKEN_FIELD_NUMBER = 5;

  @SuppressWarnings("serial")
  private volatile java.lang.Object attributionToken_ = "";
  /**
   *
   *
   * <pre>
   * Highly recommended for user events that are the result of
   * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
   * This field enables accurate attribution of recommendation model
   * performance.
   * The value must be a valid
   * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
   * for user events that are the result of
   * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
   * The value must be a valid
   * [SearchResponse.attribution_token][google.cloud.retail.v2alpha.SearchResponse.attribution_token]
   * for user events that are the result of
   * [SearchService.Search][google.cloud.retail.v2alpha.SearchService.Search].
   * This token enables us to accurately attribute page view or purchase back to
   * the event and the particular predict response containing this
   * clicked/purchased product. If user clicks on product K in the
   * recommendation results, pass
   * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
   * as a URL parameter to product K's page. When recording events on product
   * K's page, log the
   * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
   * to this field.
   * </pre>
   *
   * <code>string attribution_token = 5;</code>
   *
   * @return The attributionToken.
   */
  @java.lang.Override
  public java.lang.String getAttributionToken() {
    java.lang.Object ref = attributionToken_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      attributionToken_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * Highly recommended for user events that are the result of
   * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
   * This field enables accurate attribution of recommendation model
   * performance.
   * The value must be a valid
   * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
   * for user events that are the result of
   * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
   * The value must be a valid
   * [SearchResponse.attribution_token][google.cloud.retail.v2alpha.SearchResponse.attribution_token]
   * for user events that are the result of
   * [SearchService.Search][google.cloud.retail.v2alpha.SearchService.Search].
   * This token enables us to accurately attribute page view or purchase back to
   * the event and the particular predict response containing this
   * clicked/purchased product. If user clicks on product K in the
   * recommendation results, pass
   * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
   * as a URL parameter to product K's page. When recording events on product
   * K's page, log the
   * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
   * to this field.
   * </pre>
   *
   * <code>string attribution_token = 5;</code>
   *
   * @return The bytes for attributionToken.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getAttributionTokenBytes() {
    java.lang.Object ref = attributionToken_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      attributionToken_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int PRODUCT_DETAILS_FIELD_NUMBER = 6;

  @SuppressWarnings("serial")
  private java.util.List<com.google.cloud.retail.v2alpha.ProductDetail> productDetails_;
  /**
   *
   *
   * <pre>
   * The main product details related to the event.
   * This field is optional except for the following event types:
   * * `add-to-cart`
   * * `detail-page-view`
   * * `purchase-complete`
   * In a `search` event, this field represents the products returned to the end
   * user on the current page (the end user may have not finished browsing the
   * whole page yet). When a new page is returned to the end user, after
   * pagination/filtering/ordering even for the same query, a new `search` event
   * with different
   * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
   * desired. The end user may have not finished browsing the whole page yet.
   * </pre>
   *
   * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
   */
  @java.lang.Override
  public java.util.List<com.google.cloud.retail.v2alpha.ProductDetail> getProductDetailsList() {
    return productDetails_;
  }
  /**
   *
   *
   * <pre>
   * The main product details related to the event.
   * This field is optional except for the following event types:
   * * `add-to-cart`
   * * `detail-page-view`
   * * `purchase-complete`
   * In a `search` event, this field represents the products returned to the end
   * user on the current page (the end user may have not finished browsing the
   * whole page yet). When a new page is returned to the end user, after
   * pagination/filtering/ordering even for the same query, a new `search` event
   * with different
   * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
   * desired. The end user may have not finished browsing the whole page yet.
   * </pre>
   *
   * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
   */
  @java.lang.Override
  public java.util.List<? extends com.google.cloud.retail.v2alpha.ProductDetailOrBuilder>
      getProductDetailsOrBuilderList() {
    return productDetails_;
  }
  /**
   *
   *
   * <pre>
   * The main product details related to the event.
   * This field is optional except for the following event types:
   * * `add-to-cart`
   * * `detail-page-view`
   * * `purchase-complete`
   * In a `search` event, this field represents the products returned to the end
   * user on the current page (the end user may have not finished browsing the
   * whole page yet). When a new page is returned to the end user, after
   * pagination/filtering/ordering even for the same query, a new `search` event
   * with different
   * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
   * desired. The end user may have not finished browsing the whole page yet.
   * </pre>
   *
   * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
   */
  @java.lang.Override
  public int getProductDetailsCount() {
    return productDetails_.size();
  }
  /**
   *
   *
   * <pre>
   * The main product details related to the event.
   * This field is optional except for the following event types:
   * * `add-to-cart`
   * * `detail-page-view`
   * * `purchase-complete`
   * In a `search` event, this field represents the products returned to the end
   * user on the current page (the end user may have not finished browsing the
   * whole page yet). When a new page is returned to the end user, after
   * pagination/filtering/ordering even for the same query, a new `search` event
   * with different
   * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
   * desired. The end user may have not finished browsing the whole page yet.
   * </pre>
   *
   * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
   */
  @java.lang.Override
  public com.google.cloud.retail.v2alpha.ProductDetail getProductDetails(int index) {
    return productDetails_.get(index);
  }
  /**
   *
   *
   * <pre>
   * The main product details related to the event.
   * This field is optional except for the following event types:
   * * `add-to-cart`
   * * `detail-page-view`
   * * `purchase-complete`
   * In a `search` event, this field represents the products returned to the end
   * user on the current page (the end user may have not finished browsing the
   * whole page yet). When a new page is returned to the end user, after
   * pagination/filtering/ordering even for the same query, a new `search` event
   * with different
   * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
   * desired. The end user may have not finished browsing the whole page yet.
   * </pre>
   *
   * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
   */
  @java.lang.Override
  public com.google.cloud.retail.v2alpha.ProductDetailOrBuilder getProductDetailsOrBuilder(
      int index) {
    return productDetails_.get(index);
  }

  public static final int COMPLETION_DETAIL_FIELD_NUMBER = 22;
  private com.google.cloud.retail.v2alpha.CompletionDetail completionDetail_;
  /**
   *
   *
   * <pre>
   * The main auto-completion details related to the event.
   * This field should be set for `search` event when autocomplete function is
   * enabled and the user clicks a suggestion for search.
   * </pre>
   *
   * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
   *
   * @return Whether the completionDetail field is set.
   */
  @java.lang.Override
  public boolean hasCompletionDetail() {
    return completionDetail_ != null;
  }
  /**
   *
   *
   * <pre>
   * The main auto-completion details related to the event.
   * This field should be set for `search` event when autocomplete function is
   * enabled and the user clicks a suggestion for search.
   * </pre>
   *
   * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
   *
   * @return The completionDetail.
   */
  @java.lang.Override
  public com.google.cloud.retail.v2alpha.CompletionDetail getCompletionDetail() {
    return completionDetail_ == null
        ? com.google.cloud.retail.v2alpha.CompletionDetail.getDefaultInstance()
        : completionDetail_;
  }
  /**
   *
   *
   * <pre>
   * The main auto-completion details related to the event.
   * This field should be set for `search` event when autocomplete function is
   * enabled and the user clicks a suggestion for search.
   * </pre>
   *
   * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
   */
  @java.lang.Override
  public com.google.cloud.retail.v2alpha.CompletionDetailOrBuilder getCompletionDetailOrBuilder() {
    return completionDetail_ == null
        ? com.google.cloud.retail.v2alpha.CompletionDetail.getDefaultInstance()
        : completionDetail_;
  }

  public static final int ATTRIBUTES_FIELD_NUMBER = 7;

  private static final class AttributesDefaultEntryHolder {
    static final com.google.protobuf.MapEntry<
            java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
        defaultEntry =
            com.google.protobuf.MapEntry
                .<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
                    newDefaultInstance(
                        com.google.cloud.retail.v2alpha.UserEventProto
                            .internal_static_google_cloud_retail_v2alpha_UserEvent_AttributesEntry_descriptor,
                        com.google.protobuf.WireFormat.FieldType.STRING,
                        "",
                        com.google.protobuf.WireFormat.FieldType.MESSAGE,
                        com.google.cloud.retail.v2alpha.CustomAttribute.getDefaultInstance());
  }

  @SuppressWarnings("serial")
  private com.google.protobuf.MapField<
          java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
      attributes_;

  private com.google.protobuf.MapField<
          java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
      internalGetAttributes() {
    if (attributes_ == null) {
      return com.google.protobuf.MapField.emptyMapField(AttributesDefaultEntryHolder.defaultEntry);
    }
    return attributes_;
  }

  public int getAttributesCount() {
    return internalGetAttributes().getMap().size();
  }
  /**
   *
   *
   * <pre>
   * Extra user event features to include in the recommendation model.
   * If you provide custom attributes for ingested user events, also include
   * them in the user events that you associate with prediction requests. Custom
   * attribute formatting must be consistent between imported events and events
   * provided with prediction requests. This lets the Retail API use
   * those custom attributes when training models and serving predictions, which
   * helps improve recommendation quality.
   * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
   * error is returned:
   * * The key must be a UTF-8 encoded string with a length limit of 5,000
   *   characters.
   * * For text attributes, at most 400 values are allowed. Empty values are not
   *   allowed. Each value must be a UTF-8 encoded string with a length limit of
   *   256 characters.
   * * For number attributes, at most 400 values are allowed.
   * For product recommendations, an example of extra user information is
   * traffic_channel, which is how a user arrives at the site. Users can arrive
   * at the site by coming to the site directly, coming through Google
   * search, or in other ways.
   * </pre>
   *
   * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
   */
  @java.lang.Override
  public boolean containsAttributes(java.lang.String key) {
    if (key == null) {
      throw new NullPointerException("map key");
    }
    return internalGetAttributes().getMap().containsKey(key);
  }
  /** Use {@link #getAttributesMap()} instead. */
  @java.lang.Override
  @java.lang.Deprecated
  public java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
      getAttributes() {
    return getAttributesMap();
  }
  /**
   *
   *
   * <pre>
   * Extra user event features to include in the recommendation model.
   * If you provide custom attributes for ingested user events, also include
   * them in the user events that you associate with prediction requests. Custom
   * attribute formatting must be consistent between imported events and events
   * provided with prediction requests. This lets the Retail API use
   * those custom attributes when training models and serving predictions, which
   * helps improve recommendation quality.
   * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
   * error is returned:
   * * The key must be a UTF-8 encoded string with a length limit of 5,000
   *   characters.
   * * For text attributes, at most 400 values are allowed. Empty values are not
   *   allowed. Each value must be a UTF-8 encoded string with a length limit of
   *   256 characters.
   * * For number attributes, at most 400 values are allowed.
   * For product recommendations, an example of extra user information is
   * traffic_channel, which is how a user arrives at the site. Users can arrive
   * at the site by coming to the site directly, coming through Google
   * search, or in other ways.
   * </pre>
   *
   * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
   */
  @java.lang.Override
  public java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
      getAttributesMap() {
    return internalGetAttributes().getMap();
  }
  /**
   *
   *
   * <pre>
   * Extra user event features to include in the recommendation model.
   * If you provide custom attributes for ingested user events, also include
   * them in the user events that you associate with prediction requests. Custom
   * attribute formatting must be consistent between imported events and events
   * provided with prediction requests. This lets the Retail API use
   * those custom attributes when training models and serving predictions, which
   * helps improve recommendation quality.
   * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
   * error is returned:
   * * The key must be a UTF-8 encoded string with a length limit of 5,000
   *   characters.
   * * For text attributes, at most 400 values are allowed. Empty values are not
   *   allowed. Each value must be a UTF-8 encoded string with a length limit of
   *   256 characters.
   * * For number attributes, at most 400 values are allowed.
   * For product recommendations, an example of extra user information is
   * traffic_channel, which is how a user arrives at the site. Users can arrive
   * at the site by coming to the site directly, coming through Google
   * search, or in other ways.
   * </pre>
   *
   * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
   */
  @java.lang.Override
  public /* nullable */ com.google.cloud.retail.v2alpha.CustomAttribute getAttributesOrDefault(
      java.lang.String key,
      /* nullable */
      com.google.cloud.retail.v2alpha.CustomAttribute defaultValue) {
    if (key == null) {
      throw new NullPointerException("map key");
    }
    java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute> map =
        internalGetAttributes().getMap();
    return map.containsKey(key) ? map.get(key) : defaultValue;
  }
  /**
   *
   *
   * <pre>
   * Extra user event features to include in the recommendation model.
   * If you provide custom attributes for ingested user events, also include
   * them in the user events that you associate with prediction requests. Custom
   * attribute formatting must be consistent between imported events and events
   * provided with prediction requests. This lets the Retail API use
   * those custom attributes when training models and serving predictions, which
   * helps improve recommendation quality.
   * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
   * error is returned:
   * * The key must be a UTF-8 encoded string with a length limit of 5,000
   *   characters.
   * * For text attributes, at most 400 values are allowed. Empty values are not
   *   allowed. Each value must be a UTF-8 encoded string with a length limit of
   *   256 characters.
   * * For number attributes, at most 400 values are allowed.
   * For product recommendations, an example of extra user information is
   * traffic_channel, which is how a user arrives at the site. Users can arrive
   * at the site by coming to the site directly, coming through Google
   * search, or in other ways.
   * </pre>
   *
   * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
   */
  @java.lang.Override
  public com.google.cloud.retail.v2alpha.CustomAttribute getAttributesOrThrow(
      java.lang.String key) {
    if (key == null) {
      throw new NullPointerException("map key");
    }
    java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute> map =
        internalGetAttributes().getMap();
    if (!map.containsKey(key)) {
      throw new java.lang.IllegalArgumentException();
    }
    return map.get(key);
  }

  public static final int CART_ID_FIELD_NUMBER = 8;

  @SuppressWarnings("serial")
  private volatile java.lang.Object cartId_ = "";
  /**
   *
   *
   * <pre>
   * The ID or name of the associated shopping cart. This ID is used
   * to associate multiple items added or present in the cart before purchase.
   * This can only be set for `add-to-cart`, `purchase-complete`, or
   * `shopping-cart-page-view` events.
   * </pre>
   *
   * <code>string cart_id = 8;</code>
   *
   * @return The cartId.
   */
  @java.lang.Override
  public java.lang.String getCartId() {
    java.lang.Object ref = cartId_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      cartId_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * The ID or name of the associated shopping cart. This ID is used
   * to associate multiple items added or present in the cart before purchase.
   * This can only be set for `add-to-cart`, `purchase-complete`, or
   * `shopping-cart-page-view` events.
   * </pre>
   *
   * <code>string cart_id = 8;</code>
   *
   * @return The bytes for cartId.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getCartIdBytes() {
    java.lang.Object ref = cartId_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      cartId_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int PURCHASE_TRANSACTION_FIELD_NUMBER = 9;
  private com.google.cloud.retail.v2alpha.PurchaseTransaction purchaseTransaction_;
  /**
   *
   *
   * <pre>
   * A transaction represents the entire purchase transaction.
   * Required for `purchase-complete` events. Other event types should not set
   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
   *
   * @return Whether the purchaseTransaction field is set.
   */
  @java.lang.Override
  public boolean hasPurchaseTransaction() {
    return purchaseTransaction_ != null;
  }
  /**
   *
   *
   * <pre>
   * A transaction represents the entire purchase transaction.
   * Required for `purchase-complete` events. Other event types should not set
   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
   *
   * @return The purchaseTransaction.
   */
  @java.lang.Override
  public com.google.cloud.retail.v2alpha.PurchaseTransaction getPurchaseTransaction() {
    return purchaseTransaction_ == null
        ? com.google.cloud.retail.v2alpha.PurchaseTransaction.getDefaultInstance()
        : purchaseTransaction_;
  }
  /**
   *
   *
   * <pre>
   * A transaction represents the entire purchase transaction.
   * Required for `purchase-complete` events. Other event types should not set
   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
   */
  @java.lang.Override
  public com.google.cloud.retail.v2alpha.PurchaseTransactionOrBuilder
      getPurchaseTransactionOrBuilder() {
    return purchaseTransaction_ == null
        ? com.google.cloud.retail.v2alpha.PurchaseTransaction.getDefaultInstance()
        : purchaseTransaction_;
  }

  public static final int SEARCH_QUERY_FIELD_NUMBER = 10;

  @SuppressWarnings("serial")
  private volatile java.lang.Object searchQuery_ = "";
  /**
   *
   *
   * <pre>
   * The user's search query.
   * See [SearchRequest.query][google.cloud.retail.v2alpha.SearchRequest.query]
   * for definition.
   * The value must be a UTF-8 encoded string with a length limit of 5,000
   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
   * At least one of
   * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
   * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
   * required for `search` events. Other event types should not set this field.
   * Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>string search_query = 10;</code>
   *
   * @return The searchQuery.
   */
  @java.lang.Override
  public java.lang.String getSearchQuery() {
    java.lang.Object ref = searchQuery_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      searchQuery_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * The user's search query.
   * See [SearchRequest.query][google.cloud.retail.v2alpha.SearchRequest.query]
   * for definition.
   * The value must be a UTF-8 encoded string with a length limit of 5,000
   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
   * At least one of
   * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
   * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
   * required for `search` events. Other event types should not set this field.
   * Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>string search_query = 10;</code>
   *
   * @return The bytes for searchQuery.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getSearchQueryBytes() {
    java.lang.Object ref = searchQuery_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      searchQuery_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int FILTER_FIELD_NUMBER = 16;

  @SuppressWarnings("serial")
  private volatile java.lang.Object filter_ = "";
  /**
   *
   *
   * <pre>
   * The filter syntax consists of an expression language for constructing a
   * predicate from one or more fields of the products being filtered.
   * See
   * [SearchRequest.filter][google.cloud.retail.v2alpha.SearchRequest.filter]
   * for definition and syntax.
   * The value must be a UTF-8 encoded string with a length limit of 1,000
   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>string filter = 16;</code>
   *
   * @return The filter.
   */
  @java.lang.Override
  public java.lang.String getFilter() {
    java.lang.Object ref = filter_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      filter_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * The filter syntax consists of an expression language for constructing a
   * predicate from one or more fields of the products being filtered.
   * See
   * [SearchRequest.filter][google.cloud.retail.v2alpha.SearchRequest.filter]
   * for definition and syntax.
   * The value must be a UTF-8 encoded string with a length limit of 1,000
   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>string filter = 16;</code>
   *
   * @return The bytes for filter.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getFilterBytes() {
    java.lang.Object ref = filter_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      filter_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int ORDER_BY_FIELD_NUMBER = 17;

  @SuppressWarnings("serial")
  private volatile java.lang.Object orderBy_ = "";
  /**
   *
   *
   * <pre>
   * The order in which products are returned.
   * See
   * [SearchRequest.order_by][google.cloud.retail.v2alpha.SearchRequest.order_by]
   * for definition and syntax.
   * The value must be a UTF-8 encoded string with a length limit of 1,000
   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
   * This can only be set for `search` events. Other event types should not set
   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>string order_by = 17;</code>
   *
   * @return The orderBy.
   */
  @java.lang.Override
  public java.lang.String getOrderBy() {
    java.lang.Object ref = orderBy_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      orderBy_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * The order in which products are returned.
   * See
   * [SearchRequest.order_by][google.cloud.retail.v2alpha.SearchRequest.order_by]
   * for definition and syntax.
   * The value must be a UTF-8 encoded string with a length limit of 1,000
   * characters. Otherwise, an INVALID_ARGUMENT error is returned.
   * This can only be set for `search` events. Other event types should not set
   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>string order_by = 17;</code>
   *
   * @return The bytes for orderBy.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getOrderByBytes() {
    java.lang.Object ref = orderBy_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      orderBy_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int OFFSET_FIELD_NUMBER = 18;
  private int offset_ = 0;
  /**
   *
   *
   * <pre>
   * An integer that specifies the current offset for pagination (the 0-indexed
   * starting location, amongst the products deemed by the API as relevant).
   * See
   * [SearchRequest.offset][google.cloud.retail.v2alpha.SearchRequest.offset]
   * for definition.
   * If this field is negative, an INVALID_ARGUMENT is returned.
   * This can only be set for `search` events. Other event types should not set
   * this field. Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>int32 offset = 18;</code>
   *
   * @return The offset.
   */
  @java.lang.Override
  public int getOffset() {
    return offset_;
  }

  public static final int PAGE_CATEGORIES_FIELD_NUMBER = 11;

  @SuppressWarnings("serial")
  private com.google.protobuf.LazyStringList pageCategories_;
  /**
   *
   *
   * <pre>
   * The categories associated with a category page.
   * To represent full path of category, use '&gt;' sign to separate different
   * hierarchies. If '&gt;' is part of the category name, replace it with
   * other character(s).
   * Category pages include special pages such as sales or promotions. For
   * instance, a special sale page may have the category hierarchy:
   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
   * Required for `category-page-view` events. At least one of
   * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
   * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
   * required for `search` events. Other event types should not set this field.
   * Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>repeated string page_categories = 11;</code>
   *
   * @return A list containing the pageCategories.
   */
  public com.google.protobuf.ProtocolStringList getPageCategoriesList() {
    return pageCategories_;
  }
  /**
   *
   *
   * <pre>
   * The categories associated with a category page.
   * To represent full path of category, use '&gt;' sign to separate different
   * hierarchies. If '&gt;' is part of the category name, replace it with
   * other character(s).
   * Category pages include special pages such as sales or promotions. For
   * instance, a special sale page may have the category hierarchy:
   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
   * Required for `category-page-view` events. At least one of
   * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
   * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
   * required for `search` events. Other event types should not set this field.
   * Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>repeated string page_categories = 11;</code>
   *
   * @return The count of pageCategories.
   */
  public int getPageCategoriesCount() {
    return pageCategories_.size();
  }
  /**
   *
   *
   * <pre>
   * The categories associated with a category page.
   * To represent full path of category, use '&gt;' sign to separate different
   * hierarchies. If '&gt;' is part of the category name, replace it with
   * other character(s).
   * Category pages include special pages such as sales or promotions. For
   * instance, a special sale page may have the category hierarchy:
   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
   * Required for `category-page-view` events. At least one of
   * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
   * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
   * required for `search` events. Other event types should not set this field.
   * Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>repeated string page_categories = 11;</code>
   *
   * @param index The index of the element to return.
   * @return The pageCategories at the given index.
   */
  public java.lang.String getPageCategories(int index) {
    return pageCategories_.get(index);
  }
  /**
   *
   *
   * <pre>
   * The categories associated with a category page.
   * To represent full path of category, use '&gt;' sign to separate different
   * hierarchies. If '&gt;' is part of the category name, replace it with
   * other character(s).
   * Category pages include special pages such as sales or promotions. For
   * instance, a special sale page may have the category hierarchy:
   * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
   * Required for `category-page-view` events. At least one of
   * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
   * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
   * required for `search` events. Other event types should not set this field.
   * Otherwise, an INVALID_ARGUMENT error is returned.
   * </pre>
   *
   * <code>repeated string page_categories = 11;</code>
   *
   * @param index The index of the value to return.
   * @return The bytes of the pageCategories at the given index.
   */
  public com.google.protobuf.ByteString getPageCategoriesBytes(int index) {
    return pageCategories_.getByteString(index);
  }

  public static final int USER_INFO_FIELD_NUMBER = 12;
  private com.google.cloud.retail.v2alpha.UserInfo userInfo_;
  /**
   *
   *
   * <pre>
   * User information.
   * </pre>
   *
   * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
   *
   * @return Whether the userInfo field is set.
   */
  @java.lang.Override
  public boolean hasUserInfo() {
    return userInfo_ != null;
  }
  /**
   *
   *
   * <pre>
   * User information.
   * </pre>
   *
   * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
   *
   * @return The userInfo.
   */
  @java.lang.Override
  public com.google.cloud.retail.v2alpha.UserInfo getUserInfo() {
    return userInfo_ == null
        ? com.google.cloud.retail.v2alpha.UserInfo.getDefaultInstance()
        : userInfo_;
  }
  /**
   *
   *
   * <pre>
   * User information.
   * </pre>
   *
   * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
   */
  @java.lang.Override
  public com.google.cloud.retail.v2alpha.UserInfoOrBuilder getUserInfoOrBuilder() {
    return userInfo_ == null
        ? com.google.cloud.retail.v2alpha.UserInfo.getDefaultInstance()
        : userInfo_;
  }

  public static final int URI_FIELD_NUMBER = 13;

  @SuppressWarnings("serial")
  private volatile java.lang.Object uri_ = "";
  /**
   *
   *
   * <pre>
   * Complete URL (window.location.href) of the user's current page.
   * When using the client side event reporting with JavaScript pixel and Google
   * Tag Manager, this value is filled in automatically. Maximum length 5,000
   * characters.
   * </pre>
   *
   * <code>string uri = 13;</code>
   *
   * @return The uri.
   */
  @java.lang.Override
  public java.lang.String getUri() {
    java.lang.Object ref = uri_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      uri_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * Complete URL (window.location.href) of the user's current page.
   * When using the client side event reporting with JavaScript pixel and Google
   * Tag Manager, this value is filled in automatically. Maximum length 5,000
   * characters.
   * </pre>
   *
   * <code>string uri = 13;</code>
   *
   * @return The bytes for uri.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getUriBytes() {
    java.lang.Object ref = uri_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      uri_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int REFERRER_URI_FIELD_NUMBER = 14;

  @SuppressWarnings("serial")
  private volatile java.lang.Object referrerUri_ = "";
  /**
   *
   *
   * <pre>
   * The referrer URL of the current page.
   * When using the client side event reporting with JavaScript pixel and Google
   * Tag Manager, this value is filled in automatically.
   * </pre>
   *
   * <code>string referrer_uri = 14;</code>
   *
   * @return The referrerUri.
   */
  @java.lang.Override
  public java.lang.String getReferrerUri() {
    java.lang.Object ref = referrerUri_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      referrerUri_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * The referrer URL of the current page.
   * When using the client side event reporting with JavaScript pixel and Google
   * Tag Manager, this value is filled in automatically.
   * </pre>
   *
   * <code>string referrer_uri = 14;</code>
   *
   * @return The bytes for referrerUri.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getReferrerUriBytes() {
    java.lang.Object ref = referrerUri_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      referrerUri_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int PAGE_VIEW_ID_FIELD_NUMBER = 15;

  @SuppressWarnings("serial")
  private volatile java.lang.Object pageViewId_ = "";
  /**
   *
   *
   * <pre>
   * A unique ID of a web page view.
   * This should be kept the same for all user events triggered from the same
   * pageview. For example, an item detail page view could trigger multiple
   * events as the user is browsing the page. The `pageViewId` property should
   * be kept the same for all these events so that they can be grouped together
   * properly.
   * When using the client side event reporting with JavaScript pixel and Google
   * Tag Manager, this value is filled in automatically.
   * </pre>
   *
   * <code>string page_view_id = 15;</code>
   *
   * @return The pageViewId.
   */
  @java.lang.Override
  public java.lang.String getPageViewId() {
    java.lang.Object ref = pageViewId_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      pageViewId_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * A unique ID of a web page view.
   * This should be kept the same for all user events triggered from the same
   * pageview. For example, an item detail page view could trigger multiple
   * events as the user is browsing the page. The `pageViewId` property should
   * be kept the same for all these events so that they can be grouped together
   * properly.
   * When using the client side event reporting with JavaScript pixel and Google
   * Tag Manager, this value is filled in automatically.
   * </pre>
   *
   * <code>string page_view_id = 15;</code>
   *
   * @return The bytes for pageViewId.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getPageViewIdBytes() {
    java.lang.Object ref = pageViewId_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      pageViewId_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int ENTITY_FIELD_NUMBER = 23;

  @SuppressWarnings("serial")
  private volatile java.lang.Object entity_ = "";
  /**
   *
   *
   * <pre>
   * The entity for customers that may run multiple different entities, domains,
   * sites or regions, for example, `Google US`, `Google Ads`, `Waymo`,
   * `google.com`, `youtube.com`, etc.
   * It is recommended to set this field to get better per-entity search,
   * completion and prediction results.
   * </pre>
   *
   * <code>string entity = 23;</code>
   *
   * @return The entity.
   */
  @java.lang.Override
  public java.lang.String getEntity() {
    java.lang.Object ref = entity_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      entity_ = s;
      return s;
    }
  }
  /**
   *
   *
   * <pre>
   * The entity for customers that may run multiple different entities, domains,
   * sites or regions, for example, `Google US`, `Google Ads`, `Waymo`,
   * `google.com`, `youtube.com`, etc.
   * It is recommended to set this field to get better per-entity search,
   * completion and prediction results.
   * </pre>
   *
   * <code>string entity = 23;</code>
   *
   * @return The bytes for entity.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getEntityBytes() {
    java.lang.Object ref = entity_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      entity_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  private byte memoizedIsInitialized = -1;

  @java.lang.Override
  public final boolean isInitialized() {
    byte isInitialized = memoizedIsInitialized;
    if (isInitialized == 1) return true;
    if (isInitialized == 0) return false;

    memoizedIsInitialized = 1;
    return true;
  }

  @java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(eventType_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 1, eventType_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(visitorId_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 2, visitorId_);
    }
    if (eventTime_ != null) {
      output.writeMessage(3, getEventTime());
    }
    for (int i = 0; i < experimentIds_.size(); i++) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 4, experimentIds_.getRaw(i));
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(attributionToken_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 5, attributionToken_);
    }
    for (int i = 0; i < productDetails_.size(); i++) {
      output.writeMessage(6, productDetails_.get(i));
    }
    com.google.protobuf.GeneratedMessageV3.serializeStringMapTo(
        output, internalGetAttributes(), AttributesDefaultEntryHolder.defaultEntry, 7);
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(cartId_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 8, cartId_);
    }
    if (purchaseTransaction_ != null) {
      output.writeMessage(9, getPurchaseTransaction());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(searchQuery_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 10, searchQuery_);
    }
    for (int i = 0; i < pageCategories_.size(); i++) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 11, pageCategories_.getRaw(i));
    }
    if (userInfo_ != null) {
      output.writeMessage(12, getUserInfo());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(uri_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 13, uri_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(referrerUri_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 14, referrerUri_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(pageViewId_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 15, pageViewId_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 16, filter_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(orderBy_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 17, orderBy_);
    }
    if (offset_ != 0) {
      output.writeInt32(18, offset_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(sessionId_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 21, sessionId_);
    }
    if (completionDetail_ != null) {
      output.writeMessage(22, getCompletionDetail());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(entity_)) {
      com.google.protobuf.GeneratedMessageV3.writeString(output, 23, entity_);
    }
    getUnknownFields().writeTo(output);
  }

  @java.lang.Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(eventType_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, eventType_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(visitorId_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, visitorId_);
    }
    if (eventTime_ != null) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(3, getEventTime());
    }
    {
      int dataSize = 0;
      for (int i = 0; i < experimentIds_.size(); i++) {
        dataSize += computeStringSizeNoTag(experimentIds_.getRaw(i));
      }
      size += dataSize;
      size += 1 * getExperimentIdsList().size();
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(attributionToken_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(5, attributionToken_);
    }
    for (int i = 0; i < productDetails_.size(); i++) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(6, productDetails_.get(i));
    }
    for (java.util.Map.Entry<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
        entry : internalGetAttributes().getMap().entrySet()) {
      com.google.protobuf.MapEntry<
              java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
          attributes__ =
              AttributesDefaultEntryHolder.defaultEntry
                  .newBuilderForType()
                  .setKey(entry.getKey())
                  .setValue(entry.getValue())
                  .build();
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(7, attributes__);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(cartId_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(8, cartId_);
    }
    if (purchaseTransaction_ != null) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(9, getPurchaseTransaction());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(searchQuery_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(10, searchQuery_);
    }
    {
      int dataSize = 0;
      for (int i = 0; i < pageCategories_.size(); i++) {
        dataSize += computeStringSizeNoTag(pageCategories_.getRaw(i));
      }
      size += dataSize;
      size += 1 * getPageCategoriesList().size();
    }
    if (userInfo_ != null) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(12, getUserInfo());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(uri_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(13, uri_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(referrerUri_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(14, referrerUri_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(pageViewId_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(15, pageViewId_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(filter_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(16, filter_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(orderBy_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(17, orderBy_);
    }
    if (offset_ != 0) {
      size += com.google.protobuf.CodedOutputStream.computeInt32Size(18, offset_);
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(sessionId_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(21, sessionId_);
    }
    if (completionDetail_ != null) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(22, getCompletionDetail());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(entity_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(23, entity_);
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }

  @java.lang.Override
  public boolean equals(final java.lang.Object obj) {
    if (obj == this) {
      return true;
    }
    if (!(obj instanceof com.google.cloud.retail.v2alpha.UserEvent)) {
      return super.equals(obj);
    }
    com.google.cloud.retail.v2alpha.UserEvent other =
        (com.google.cloud.retail.v2alpha.UserEvent) obj;

    if (!getEventType().equals(other.getEventType())) return false;
    if (!getVisitorId().equals(other.getVisitorId())) return false;
    if (!getSessionId().equals(other.getSessionId())) return false;
    if (hasEventTime() != other.hasEventTime()) return false;
    if (hasEventTime()) {
      if (!getEventTime().equals(other.getEventTime())) return false;
    }
    if (!getExperimentIdsList().equals(other.getExperimentIdsList())) return false;
    if (!getAttributionToken().equals(other.getAttributionToken())) return false;
    if (!getProductDetailsList().equals(other.getProductDetailsList())) return false;
    if (hasCompletionDetail() != other.hasCompletionDetail()) return false;
    if (hasCompletionDetail()) {
      if (!getCompletionDetail().equals(other.getCompletionDetail())) return false;
    }
    if (!internalGetAttributes().equals(other.internalGetAttributes())) return false;
    if (!getCartId().equals(other.getCartId())) return false;
    if (hasPurchaseTransaction() != other.hasPurchaseTransaction()) return false;
    if (hasPurchaseTransaction()) {
      if (!getPurchaseTransaction().equals(other.getPurchaseTransaction())) return false;
    }
    if (!getSearchQuery().equals(other.getSearchQuery())) return false;
    if (!getFilter().equals(other.getFilter())) return false;
    if (!getOrderBy().equals(other.getOrderBy())) return false;
    if (getOffset() != other.getOffset()) return false;
    if (!getPageCategoriesList().equals(other.getPageCategoriesList())) return false;
    if (hasUserInfo() != other.hasUserInfo()) return false;
    if (hasUserInfo()) {
      if (!getUserInfo().equals(other.getUserInfo())) return false;
    }
    if (!getUri().equals(other.getUri())) return false;
    if (!getReferrerUri().equals(other.getReferrerUri())) return false;
    if (!getPageViewId().equals(other.getPageViewId())) return false;
    if (!getEntity().equals(other.getEntity())) return false;
    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
    return true;
  }

  @java.lang.Override
  public int hashCode() {
    if (memoizedHashCode != 0) {
      return memoizedHashCode;
    }
    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
    hash = (37 * hash) + EVENT_TYPE_FIELD_NUMBER;
    hash = (53 * hash) + getEventType().hashCode();
    hash = (37 * hash) + VISITOR_ID_FIELD_NUMBER;
    hash = (53 * hash) + getVisitorId().hashCode();
    hash = (37 * hash) + SESSION_ID_FIELD_NUMBER;
    hash = (53 * hash) + getSessionId().hashCode();
    if (hasEventTime()) {
      hash = (37 * hash) + EVENT_TIME_FIELD_NUMBER;
      hash = (53 * hash) + getEventTime().hashCode();
    }
    if (getExperimentIdsCount() > 0) {
      hash = (37 * hash) + EXPERIMENT_IDS_FIELD_NUMBER;
      hash = (53 * hash) + getExperimentIdsList().hashCode();
    }
    hash = (37 * hash) + ATTRIBUTION_TOKEN_FIELD_NUMBER;
    hash = (53 * hash) + getAttributionToken().hashCode();
    if (getProductDetailsCount() > 0) {
      hash = (37 * hash) + PRODUCT_DETAILS_FIELD_NUMBER;
      hash = (53 * hash) + getProductDetailsList().hashCode();
    }
    if (hasCompletionDetail()) {
      hash = (37 * hash) + COMPLETION_DETAIL_FIELD_NUMBER;
      hash = (53 * hash) + getCompletionDetail().hashCode();
    }
    if (!internalGetAttributes().getMap().isEmpty()) {
      hash = (37 * hash) + ATTRIBUTES_FIELD_NUMBER;
      hash = (53 * hash) + internalGetAttributes().hashCode();
    }
    hash = (37 * hash) + CART_ID_FIELD_NUMBER;
    hash = (53 * hash) + getCartId().hashCode();
    if (hasPurchaseTransaction()) {
      hash = (37 * hash) + PURCHASE_TRANSACTION_FIELD_NUMBER;
      hash = (53 * hash) + getPurchaseTransaction().hashCode();
    }
    hash = (37 * hash) + SEARCH_QUERY_FIELD_NUMBER;
    hash = (53 * hash) + getSearchQuery().hashCode();
    hash = (37 * hash) + FILTER_FIELD_NUMBER;
    hash = (53 * hash) + getFilter().hashCode();
    hash = (37 * hash) + ORDER_BY_FIELD_NUMBER;
    hash = (53 * hash) + getOrderBy().hashCode();
    hash = (37 * hash) + OFFSET_FIELD_NUMBER;
    hash = (53 * hash) + getOffset();
    if (getPageCategoriesCount() > 0) {
      hash = (37 * hash) + PAGE_CATEGORIES_FIELD_NUMBER;
      hash = (53 * hash) + getPageCategoriesList().hashCode();
    }
    if (hasUserInfo()) {
      hash = (37 * hash) + USER_INFO_FIELD_NUMBER;
      hash = (53 * hash) + getUserInfo().hashCode();
    }
    hash = (37 * hash) + URI_FIELD_NUMBER;
    hash = (53 * hash) + getUri().hashCode();
    hash = (37 * hash) + REFERRER_URI_FIELD_NUMBER;
    hash = (53 * hash) + getReferrerUri().hashCode();
    hash = (37 * hash) + PAGE_VIEW_ID_FIELD_NUMBER;
    hash = (53 * hash) + getPageViewId().hashCode();
    hash = (37 * hash) + ENTITY_FIELD_NUMBER;
    hash = (53 * hash) + getEntity().hashCode();
    hash = (29 * hash) + getUnknownFields().hashCode();
    memoizedHashCode = hash;
    return hash;
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(java.nio.ByteBuffer data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(
      java.nio.ByteBuffer data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(
      com.google.protobuf.ByteString data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(
      com.google.protobuf.ByteString data,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(byte[] data)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(
      byte[] data, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws com.google.protobuf.InvalidProtocolBufferException {
    return PARSER.parseFrom(data, extensionRegistry);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(java.io.InputStream input)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(
      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
        PARSER, input, extensionRegistry);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseDelimitedFrom(
      java.io.InputStream input) throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(PARSER, input);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseDelimitedFrom(
      java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
        PARSER, input, extensionRegistry);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(
      com.google.protobuf.CodedInputStream input) throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(PARSER, input);
  }

  public static com.google.cloud.retail.v2alpha.UserEvent parseFrom(
      com.google.protobuf.CodedInputStream input,
      com.google.protobuf.ExtensionRegistryLite extensionRegistry)
      throws java.io.IOException {
    return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
        PARSER, input, extensionRegistry);
  }

  @java.lang.Override
  public Builder newBuilderForType() {
    return newBuilder();
  }

  public static Builder newBuilder() {
    return DEFAULT_INSTANCE.toBuilder();
  }

  public static Builder newBuilder(com.google.cloud.retail.v2alpha.UserEvent prototype) {
    return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
  }

  @java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE ? new Builder() : new Builder().mergeFrom(this);
  }

  @java.lang.Override
  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
    Builder builder = new Builder(parent);
    return builder;
  }
  /**
   *
   *
   * <pre>
   * UserEvent captures all metadata information Retail API needs to know about
   * how end users interact with customers' website.
   * </pre>
   *
   * Protobuf type {@code google.cloud.retail.v2alpha.UserEvent}
   */
  public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
      implements
      // @@protoc_insertion_point(builder_implements:google.cloud.retail.v2alpha.UserEvent)
      com.google.cloud.retail.v2alpha.UserEventOrBuilder {
    public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
      return com.google.cloud.retail.v2alpha.UserEventProto
          .internal_static_google_cloud_retail_v2alpha_UserEvent_descriptor;
    }

    @SuppressWarnings({"rawtypes"})
    protected com.google.protobuf.MapField internalGetMapField(int number) {
      switch (number) {
        case 7:
          return internalGetAttributes();
        default:
          throw new RuntimeException("Invalid map field number: " + number);
      }
    }

    @SuppressWarnings({"rawtypes"})
    protected com.google.protobuf.MapField internalGetMutableMapField(int number) {
      switch (number) {
        case 7:
          return internalGetMutableAttributes();
        default:
          throw new RuntimeException("Invalid map field number: " + number);
      }
    }

    @java.lang.Override
    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
        internalGetFieldAccessorTable() {
      return com.google.cloud.retail.v2alpha.UserEventProto
          .internal_static_google_cloud_retail_v2alpha_UserEvent_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              com.google.cloud.retail.v2alpha.UserEvent.class,
              com.google.cloud.retail.v2alpha.UserEvent.Builder.class);
    }

    // Construct using com.google.cloud.retail.v2alpha.UserEvent.newBuilder()
    private Builder() {}

    private Builder(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
      super(parent);
    }

    @java.lang.Override
    public Builder clear() {
      super.clear();
      bitField0_ = 0;
      eventType_ = "";
      visitorId_ = "";
      sessionId_ = "";
      eventTime_ = null;
      if (eventTimeBuilder_ != null) {
        eventTimeBuilder_.dispose();
        eventTimeBuilder_ = null;
      }
      experimentIds_ = com.google.protobuf.LazyStringArrayList.EMPTY;
      bitField0_ = (bitField0_ & ~0x00000010);
      attributionToken_ = "";
      if (productDetailsBuilder_ == null) {
        productDetails_ = java.util.Collections.emptyList();
      } else {
        productDetails_ = null;
        productDetailsBuilder_.clear();
      }
      bitField0_ = (bitField0_ & ~0x00000040);
      completionDetail_ = null;
      if (completionDetailBuilder_ != null) {
        completionDetailBuilder_.dispose();
        completionDetailBuilder_ = null;
      }
      internalGetMutableAttributes().clear();
      cartId_ = "";
      purchaseTransaction_ = null;
      if (purchaseTransactionBuilder_ != null) {
        purchaseTransactionBuilder_.dispose();
        purchaseTransactionBuilder_ = null;
      }
      searchQuery_ = "";
      filter_ = "";
      orderBy_ = "";
      offset_ = 0;
      pageCategories_ = com.google.protobuf.LazyStringArrayList.EMPTY;
      bitField0_ = (bitField0_ & ~0x00008000);
      userInfo_ = null;
      if (userInfoBuilder_ != null) {
        userInfoBuilder_.dispose();
        userInfoBuilder_ = null;
      }
      uri_ = "";
      referrerUri_ = "";
      pageViewId_ = "";
      entity_ = "";
      return this;
    }

    @java.lang.Override
    public com.google.protobuf.Descriptors.Descriptor getDescriptorForType() {
      return com.google.cloud.retail.v2alpha.UserEventProto
          .internal_static_google_cloud_retail_v2alpha_UserEvent_descriptor;
    }

    @java.lang.Override
    public com.google.cloud.retail.v2alpha.UserEvent getDefaultInstanceForType() {
      return com.google.cloud.retail.v2alpha.UserEvent.getDefaultInstance();
    }

    @java.lang.Override
    public com.google.cloud.retail.v2alpha.UserEvent build() {
      com.google.cloud.retail.v2alpha.UserEvent result = buildPartial();
      if (!result.isInitialized()) {
        throw newUninitializedMessageException(result);
      }
      return result;
    }

    @java.lang.Override
    public com.google.cloud.retail.v2alpha.UserEvent buildPartial() {
      com.google.cloud.retail.v2alpha.UserEvent result =
          new com.google.cloud.retail.v2alpha.UserEvent(this);
      buildPartialRepeatedFields(result);
      if (bitField0_ != 0) {
        buildPartial0(result);
      }
      onBuilt();
      return result;
    }

    private void buildPartialRepeatedFields(com.google.cloud.retail.v2alpha.UserEvent result) {
      if (((bitField0_ & 0x00000010) != 0)) {
        experimentIds_ = experimentIds_.getUnmodifiableView();
        bitField0_ = (bitField0_ & ~0x00000010);
      }
      result.experimentIds_ = experimentIds_;
      if (productDetailsBuilder_ == null) {
        if (((bitField0_ & 0x00000040) != 0)) {
          productDetails_ = java.util.Collections.unmodifiableList(productDetails_);
          bitField0_ = (bitField0_ & ~0x00000040);
        }
        result.productDetails_ = productDetails_;
      } else {
        result.productDetails_ = productDetailsBuilder_.build();
      }
      if (((bitField0_ & 0x00008000) != 0)) {
        pageCategories_ = pageCategories_.getUnmodifiableView();
        bitField0_ = (bitField0_ & ~0x00008000);
      }
      result.pageCategories_ = pageCategories_;
    }

    private void buildPartial0(com.google.cloud.retail.v2alpha.UserEvent result) {
      int from_bitField0_ = bitField0_;
      if (((from_bitField0_ & 0x00000001) != 0)) {
        result.eventType_ = eventType_;
      }
      if (((from_bitField0_ & 0x00000002) != 0)) {
        result.visitorId_ = visitorId_;
      }
      if (((from_bitField0_ & 0x00000004) != 0)) {
        result.sessionId_ = sessionId_;
      }
      if (((from_bitField0_ & 0x00000008) != 0)) {
        result.eventTime_ = eventTimeBuilder_ == null ? eventTime_ : eventTimeBuilder_.build();
      }
      if (((from_bitField0_ & 0x00000020) != 0)) {
        result.attributionToken_ = attributionToken_;
      }
      if (((from_bitField0_ & 0x00000080) != 0)) {
        result.completionDetail_ =
            completionDetailBuilder_ == null ? completionDetail_ : completionDetailBuilder_.build();
      }
      if (((from_bitField0_ & 0x00000100) != 0)) {
        result.attributes_ = internalGetAttributes();
        result.attributes_.makeImmutable();
      }
      if (((from_bitField0_ & 0x00000200) != 0)) {
        result.cartId_ = cartId_;
      }
      if (((from_bitField0_ & 0x00000400) != 0)) {
        result.purchaseTransaction_ =
            purchaseTransactionBuilder_ == null
                ? purchaseTransaction_
                : purchaseTransactionBuilder_.build();
      }
      if (((from_bitField0_ & 0x00000800) != 0)) {
        result.searchQuery_ = searchQuery_;
      }
      if (((from_bitField0_ & 0x00001000) != 0)) {
        result.filter_ = filter_;
      }
      if (((from_bitField0_ & 0x00002000) != 0)) {
        result.orderBy_ = orderBy_;
      }
      if (((from_bitField0_ & 0x00004000) != 0)) {
        result.offset_ = offset_;
      }
      if (((from_bitField0_ & 0x00010000) != 0)) {
        result.userInfo_ = userInfoBuilder_ == null ? userInfo_ : userInfoBuilder_.build();
      }
      if (((from_bitField0_ & 0x00020000) != 0)) {
        result.uri_ = uri_;
      }
      if (((from_bitField0_ & 0x00040000) != 0)) {
        result.referrerUri_ = referrerUri_;
      }
      if (((from_bitField0_ & 0x00080000) != 0)) {
        result.pageViewId_ = pageViewId_;
      }
      if (((from_bitField0_ & 0x00100000) != 0)) {
        result.entity_ = entity_;
      }
    }

    @java.lang.Override
    public Builder clone() {
      return super.clone();
    }

    @java.lang.Override
    public Builder setField(
        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
      return super.setField(field, value);
    }

    @java.lang.Override
    public Builder clearField(com.google.protobuf.Descriptors.FieldDescriptor field) {
      return super.clearField(field);
    }

    @java.lang.Override
    public Builder clearOneof(com.google.protobuf.Descriptors.OneofDescriptor oneof) {
      return super.clearOneof(oneof);
    }

    @java.lang.Override
    public Builder setRepeatedField(
        com.google.protobuf.Descriptors.FieldDescriptor field, int index, java.lang.Object value) {
      return super.setRepeatedField(field, index, value);
    }

    @java.lang.Override
    public Builder addRepeatedField(
        com.google.protobuf.Descriptors.FieldDescriptor field, java.lang.Object value) {
      return super.addRepeatedField(field, value);
    }

    @java.lang.Override
    public Builder mergeFrom(com.google.protobuf.Message other) {
      if (other instanceof com.google.cloud.retail.v2alpha.UserEvent) {
        return mergeFrom((com.google.cloud.retail.v2alpha.UserEvent) other);
      } else {
        super.mergeFrom(other);
        return this;
      }
    }

    public Builder mergeFrom(com.google.cloud.retail.v2alpha.UserEvent other) {
      if (other == com.google.cloud.retail.v2alpha.UserEvent.getDefaultInstance()) return this;
      if (!other.getEventType().isEmpty()) {
        eventType_ = other.eventType_;
        bitField0_ |= 0x00000001;
        onChanged();
      }
      if (!other.getVisitorId().isEmpty()) {
        visitorId_ = other.visitorId_;
        bitField0_ |= 0x00000002;
        onChanged();
      }
      if (!other.getSessionId().isEmpty()) {
        sessionId_ = other.sessionId_;
        bitField0_ |= 0x00000004;
        onChanged();
      }
      if (other.hasEventTime()) {
        mergeEventTime(other.getEventTime());
      }
      if (!other.experimentIds_.isEmpty()) {
        if (experimentIds_.isEmpty()) {
          experimentIds_ = other.experimentIds_;
          bitField0_ = (bitField0_ & ~0x00000010);
        } else {
          ensureExperimentIdsIsMutable();
          experimentIds_.addAll(other.experimentIds_);
        }
        onChanged();
      }
      if (!other.getAttributionToken().isEmpty()) {
        attributionToken_ = other.attributionToken_;
        bitField0_ |= 0x00000020;
        onChanged();
      }
      if (productDetailsBuilder_ == null) {
        if (!other.productDetails_.isEmpty()) {
          if (productDetails_.isEmpty()) {
            productDetails_ = other.productDetails_;
            bitField0_ = (bitField0_ & ~0x00000040);
          } else {
            ensureProductDetailsIsMutable();
            productDetails_.addAll(other.productDetails_);
          }
          onChanged();
        }
      } else {
        if (!other.productDetails_.isEmpty()) {
          if (productDetailsBuilder_.isEmpty()) {
            productDetailsBuilder_.dispose();
            productDetailsBuilder_ = null;
            productDetails_ = other.productDetails_;
            bitField0_ = (bitField0_ & ~0x00000040);
            productDetailsBuilder_ =
                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                    ? getProductDetailsFieldBuilder()
                    : null;
          } else {
            productDetailsBuilder_.addAllMessages(other.productDetails_);
          }
        }
      }
      if (other.hasCompletionDetail()) {
        mergeCompletionDetail(other.getCompletionDetail());
      }
      internalGetMutableAttributes().mergeFrom(other.internalGetAttributes());
      bitField0_ |= 0x00000100;
      if (!other.getCartId().isEmpty()) {
        cartId_ = other.cartId_;
        bitField0_ |= 0x00000200;
        onChanged();
      }
      if (other.hasPurchaseTransaction()) {
        mergePurchaseTransaction(other.getPurchaseTransaction());
      }
      if (!other.getSearchQuery().isEmpty()) {
        searchQuery_ = other.searchQuery_;
        bitField0_ |= 0x00000800;
        onChanged();
      }
      if (!other.getFilter().isEmpty()) {
        filter_ = other.filter_;
        bitField0_ |= 0x00001000;
        onChanged();
      }
      if (!other.getOrderBy().isEmpty()) {
        orderBy_ = other.orderBy_;
        bitField0_ |= 0x00002000;
        onChanged();
      }
      if (other.getOffset() != 0) {
        setOffset(other.getOffset());
      }
      if (!other.pageCategories_.isEmpty()) {
        if (pageCategories_.isEmpty()) {
          pageCategories_ = other.pageCategories_;
          bitField0_ = (bitField0_ & ~0x00008000);
        } else {
          ensurePageCategoriesIsMutable();
          pageCategories_.addAll(other.pageCategories_);
        }
        onChanged();
      }
      if (other.hasUserInfo()) {
        mergeUserInfo(other.getUserInfo());
      }
      if (!other.getUri().isEmpty()) {
        uri_ = other.uri_;
        bitField0_ |= 0x00020000;
        onChanged();
      }
      if (!other.getReferrerUri().isEmpty()) {
        referrerUri_ = other.referrerUri_;
        bitField0_ |= 0x00040000;
        onChanged();
      }
      if (!other.getPageViewId().isEmpty()) {
        pageViewId_ = other.pageViewId_;
        bitField0_ |= 0x00080000;
        onChanged();
      }
      if (!other.getEntity().isEmpty()) {
        entity_ = other.entity_;
        bitField0_ |= 0x00100000;
        onChanged();
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }

    @java.lang.Override
    public final boolean isInitialized() {
      return true;
    }

    @java.lang.Override
    public Builder mergeFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      if (extensionRegistry == null) {
        throw new java.lang.NullPointerException();
      }
      try {
        boolean done = false;
        while (!done) {
          int tag = input.readTag();
          switch (tag) {
            case 0:
              done = true;
              break;
            case 10:
              {
                eventType_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00000001;
                break;
              } // case 10
            case 18:
              {
                visitorId_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00000002;
                break;
              } // case 18
            case 26:
              {
                input.readMessage(getEventTimeFieldBuilder().getBuilder(), extensionRegistry);
                bitField0_ |= 0x00000008;
                break;
              } // case 26
            case 34:
              {
                java.lang.String s = input.readStringRequireUtf8();
                ensureExperimentIdsIsMutable();
                experimentIds_.add(s);
                break;
              } // case 34
            case 42:
              {
                attributionToken_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00000020;
                break;
              } // case 42
            case 50:
              {
                com.google.cloud.retail.v2alpha.ProductDetail m =
                    input.readMessage(
                        com.google.cloud.retail.v2alpha.ProductDetail.parser(), extensionRegistry);
                if (productDetailsBuilder_ == null) {
                  ensureProductDetailsIsMutable();
                  productDetails_.add(m);
                } else {
                  productDetailsBuilder_.addMessage(m);
                }
                break;
              } // case 50
            case 58:
              {
                com.google.protobuf.MapEntry<
                        java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
                    attributes__ =
                        input.readMessage(
                            AttributesDefaultEntryHolder.defaultEntry.getParserForType(),
                            extensionRegistry);
                internalGetMutableAttributes()
                    .getMutableMap()
                    .put(attributes__.getKey(), attributes__.getValue());
                bitField0_ |= 0x00000100;
                break;
              } // case 58
            case 66:
              {
                cartId_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00000200;
                break;
              } // case 66
            case 74:
              {
                input.readMessage(
                    getPurchaseTransactionFieldBuilder().getBuilder(), extensionRegistry);
                bitField0_ |= 0x00000400;
                break;
              } // case 74
            case 82:
              {
                searchQuery_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00000800;
                break;
              } // case 82
            case 90:
              {
                java.lang.String s = input.readStringRequireUtf8();
                ensurePageCategoriesIsMutable();
                pageCategories_.add(s);
                break;
              } // case 90
            case 98:
              {
                input.readMessage(getUserInfoFieldBuilder().getBuilder(), extensionRegistry);
                bitField0_ |= 0x00010000;
                break;
              } // case 98
            case 106:
              {
                uri_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00020000;
                break;
              } // case 106
            case 114:
              {
                referrerUri_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00040000;
                break;
              } // case 114
            case 122:
              {
                pageViewId_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00080000;
                break;
              } // case 122
            case 130:
              {
                filter_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00001000;
                break;
              } // case 130
            case 138:
              {
                orderBy_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00002000;
                break;
              } // case 138
            case 144:
              {
                offset_ = input.readInt32();
                bitField0_ |= 0x00004000;
                break;
              } // case 144
            case 170:
              {
                sessionId_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00000004;
                break;
              } // case 170
            case 178:
              {
                input.readMessage(
                    getCompletionDetailFieldBuilder().getBuilder(), extensionRegistry);
                bitField0_ |= 0x00000080;
                break;
              } // case 178
            case 186:
              {
                entity_ = input.readStringRequireUtf8();
                bitField0_ |= 0x00100000;
                break;
              } // case 186
            default:
              {
                if (!super.parseUnknownField(input, extensionRegistry, tag)) {
                  done = true; // was an endgroup tag
                }
                break;
              } // default:
          } // switch (tag)
        } // while (!done)
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        throw e.unwrapIOException();
      } finally {
        onChanged();
      } // finally
      return this;
    }

    private int bitField0_;

    private java.lang.Object eventType_ = "";
    /**
     *
     *
     * <pre>
     * Required. User event type. Allowed values are:
     * * `add-to-cart`: Products being added to cart.
     * * `category-page-view`: Special pages such as sale or promotion pages
     *   viewed.
     * * `detail-page-view`: Products detail page viewed.
     * * `home-page-view`: Homepage viewed.
     * * `promotion-offered`: Promotion is offered to a user.
     * * `promotion-not-offered`: Promotion is not offered to a user.
     * * `purchase-complete`: User finishing a purchase.
     * * `search`: Product search.
     * * `shopping-cart-page-view`: User viewing a shopping cart.
     * </pre>
     *
     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @return The eventType.
     */
    public java.lang.String getEventType() {
      java.lang.Object ref = eventType_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        eventType_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Required. User event type. Allowed values are:
     * * `add-to-cart`: Products being added to cart.
     * * `category-page-view`: Special pages such as sale or promotion pages
     *   viewed.
     * * `detail-page-view`: Products detail page viewed.
     * * `home-page-view`: Homepage viewed.
     * * `promotion-offered`: Promotion is offered to a user.
     * * `promotion-not-offered`: Promotion is not offered to a user.
     * * `purchase-complete`: User finishing a purchase.
     * * `search`: Product search.
     * * `shopping-cart-page-view`: User viewing a shopping cart.
     * </pre>
     *
     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @return The bytes for eventType.
     */
    public com.google.protobuf.ByteString getEventTypeBytes() {
      java.lang.Object ref = eventType_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        eventType_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Required. User event type. Allowed values are:
     * * `add-to-cart`: Products being added to cart.
     * * `category-page-view`: Special pages such as sale or promotion pages
     *   viewed.
     * * `detail-page-view`: Products detail page viewed.
     * * `home-page-view`: Homepage viewed.
     * * `promotion-offered`: Promotion is offered to a user.
     * * `promotion-not-offered`: Promotion is not offered to a user.
     * * `purchase-complete`: User finishing a purchase.
     * * `search`: Product search.
     * * `shopping-cart-page-view`: User viewing a shopping cart.
     * </pre>
     *
     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @param value The eventType to set.
     * @return This builder for chaining.
     */
    public Builder setEventType(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      eventType_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Required. User event type. Allowed values are:
     * * `add-to-cart`: Products being added to cart.
     * * `category-page-view`: Special pages such as sale or promotion pages
     *   viewed.
     * * `detail-page-view`: Products detail page viewed.
     * * `home-page-view`: Homepage viewed.
     * * `promotion-offered`: Promotion is offered to a user.
     * * `promotion-not-offered`: Promotion is not offered to a user.
     * * `purchase-complete`: User finishing a purchase.
     * * `search`: Product search.
     * * `shopping-cart-page-view`: User viewing a shopping cart.
     * </pre>
     *
     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearEventType() {
      eventType_ = getDefaultInstance().getEventType();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Required. User event type. Allowed values are:
     * * `add-to-cart`: Products being added to cart.
     * * `category-page-view`: Special pages such as sale or promotion pages
     *   viewed.
     * * `detail-page-view`: Products detail page viewed.
     * * `home-page-view`: Homepage viewed.
     * * `promotion-offered`: Promotion is offered to a user.
     * * `promotion-not-offered`: Promotion is not offered to a user.
     * * `purchase-complete`: User finishing a purchase.
     * * `search`: Product search.
     * * `shopping-cart-page-view`: User viewing a shopping cart.
     * </pre>
     *
     * <code>string event_type = 1 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @param value The bytes for eventType to set.
     * @return This builder for chaining.
     */
    public Builder setEventTypeBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      eventType_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }

    private java.lang.Object visitorId_ = "";
    /**
     *
     *
     * <pre>
     * Required. A unique identifier for tracking visitors.
     * For example, this could be implemented with an HTTP cookie, which should be
     * able to uniquely identify a visitor on a single device. This unique
     * identifier should not change if the visitor log in/out of the website.
     * Don't set the field to the same fixed ID for different users. This mixes
     * the event history of those users together, which results in degraded model
     * quality.
     * The field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * The field should not contain PII or user-data. We recommend to use Google
     * Analytics [Client
     * ID](https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#clientId)
     * for this field.
     * </pre>
     *
     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @return The visitorId.
     */
    public java.lang.String getVisitorId() {
      java.lang.Object ref = visitorId_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        visitorId_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Required. A unique identifier for tracking visitors.
     * For example, this could be implemented with an HTTP cookie, which should be
     * able to uniquely identify a visitor on a single device. This unique
     * identifier should not change if the visitor log in/out of the website.
     * Don't set the field to the same fixed ID for different users. This mixes
     * the event history of those users together, which results in degraded model
     * quality.
     * The field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * The field should not contain PII or user-data. We recommend to use Google
     * Analytics [Client
     * ID](https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#clientId)
     * for this field.
     * </pre>
     *
     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @return The bytes for visitorId.
     */
    public com.google.protobuf.ByteString getVisitorIdBytes() {
      java.lang.Object ref = visitorId_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        visitorId_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Required. A unique identifier for tracking visitors.
     * For example, this could be implemented with an HTTP cookie, which should be
     * able to uniquely identify a visitor on a single device. This unique
     * identifier should not change if the visitor log in/out of the website.
     * Don't set the field to the same fixed ID for different users. This mixes
     * the event history of those users together, which results in degraded model
     * quality.
     * The field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * The field should not contain PII or user-data. We recommend to use Google
     * Analytics [Client
     * ID](https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#clientId)
     * for this field.
     * </pre>
     *
     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @param value The visitorId to set.
     * @return This builder for chaining.
     */
    public Builder setVisitorId(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      visitorId_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Required. A unique identifier for tracking visitors.
     * For example, this could be implemented with an HTTP cookie, which should be
     * able to uniquely identify a visitor on a single device. This unique
     * identifier should not change if the visitor log in/out of the website.
     * Don't set the field to the same fixed ID for different users. This mixes
     * the event history of those users together, which results in degraded model
     * quality.
     * The field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * The field should not contain PII or user-data. We recommend to use Google
     * Analytics [Client
     * ID](https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#clientId)
     * for this field.
     * </pre>
     *
     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearVisitorId() {
      visitorId_ = getDefaultInstance().getVisitorId();
      bitField0_ = (bitField0_ & ~0x00000002);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Required. A unique identifier for tracking visitors.
     * For example, this could be implemented with an HTTP cookie, which should be
     * able to uniquely identify a visitor on a single device. This unique
     * identifier should not change if the visitor log in/out of the website.
     * Don't set the field to the same fixed ID for different users. This mixes
     * the event history of those users together, which results in degraded model
     * quality.
     * The field must be a UTF-8 encoded string with a length limit of 128
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * The field should not contain PII or user-data. We recommend to use Google
     * Analytics [Client
     * ID](https://developers.google.com/analytics/devguides/collection/analyticsjs/field-reference#clientId)
     * for this field.
     * </pre>
     *
     * <code>string visitor_id = 2 [(.google.api.field_behavior) = REQUIRED];</code>
     *
     * @param value The bytes for visitorId to set.
     * @return This builder for chaining.
     */
    public Builder setVisitorIdBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      visitorId_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }

    private java.lang.Object sessionId_ = "";
    /**
     *
     *
     * <pre>
     * A unique identifier for tracking a visitor session with a length limit of
     * 128 bytes. A session is an aggregation of an end user behavior in a time
     * span.
     * A general guideline to populate the sesion_id:
     * 1. If user has no activity for 30 min, a new session_id should be assigned.
     * 2. The session_id should be unique across users, suggest use uuid or add
     * visitor_id as prefix.
     * </pre>
     *
     * <code>string session_id = 21;</code>
     *
     * @return The sessionId.
     */
    public java.lang.String getSessionId() {
      java.lang.Object ref = sessionId_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        sessionId_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * A unique identifier for tracking a visitor session with a length limit of
     * 128 bytes. A session is an aggregation of an end user behavior in a time
     * span.
     * A general guideline to populate the sesion_id:
     * 1. If user has no activity for 30 min, a new session_id should be assigned.
     * 2. The session_id should be unique across users, suggest use uuid or add
     * visitor_id as prefix.
     * </pre>
     *
     * <code>string session_id = 21;</code>
     *
     * @return The bytes for sessionId.
     */
    public com.google.protobuf.ByteString getSessionIdBytes() {
      java.lang.Object ref = sessionId_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        sessionId_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * A unique identifier for tracking a visitor session with a length limit of
     * 128 bytes. A session is an aggregation of an end user behavior in a time
     * span.
     * A general guideline to populate the sesion_id:
     * 1. If user has no activity for 30 min, a new session_id should be assigned.
     * 2. The session_id should be unique across users, suggest use uuid or add
     * visitor_id as prefix.
     * </pre>
     *
     * <code>string session_id = 21;</code>
     *
     * @param value The sessionId to set.
     * @return This builder for chaining.
     */
    public Builder setSessionId(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      sessionId_ = value;
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A unique identifier for tracking a visitor session with a length limit of
     * 128 bytes. A session is an aggregation of an end user behavior in a time
     * span.
     * A general guideline to populate the sesion_id:
     * 1. If user has no activity for 30 min, a new session_id should be assigned.
     * 2. The session_id should be unique across users, suggest use uuid or add
     * visitor_id as prefix.
     * </pre>
     *
     * <code>string session_id = 21;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearSessionId() {
      sessionId_ = getDefaultInstance().getSessionId();
      bitField0_ = (bitField0_ & ~0x00000004);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A unique identifier for tracking a visitor session with a length limit of
     * 128 bytes. A session is an aggregation of an end user behavior in a time
     * span.
     * A general guideline to populate the sesion_id:
     * 1. If user has no activity for 30 min, a new session_id should be assigned.
     * 2. The session_id should be unique across users, suggest use uuid or add
     * visitor_id as prefix.
     * </pre>
     *
     * <code>string session_id = 21;</code>
     *
     * @param value The bytes for sessionId to set.
     * @return This builder for chaining.
     */
    public Builder setSessionIdBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      sessionId_ = value;
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }

    private com.google.protobuf.Timestamp eventTime_;
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp,
            com.google.protobuf.Timestamp.Builder,
            com.google.protobuf.TimestampOrBuilder>
        eventTimeBuilder_;
    /**
     *
     *
     * <pre>
     * Only required for
     * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
     * method. Timestamp of when the user event happened.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp event_time = 3;</code>
     *
     * @return Whether the eventTime field is set.
     */
    public boolean hasEventTime() {
      return ((bitField0_ & 0x00000008) != 0);
    }
    /**
     *
     *
     * <pre>
     * Only required for
     * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
     * method. Timestamp of when the user event happened.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp event_time = 3;</code>
     *
     * @return The eventTime.
     */
    public com.google.protobuf.Timestamp getEventTime() {
      if (eventTimeBuilder_ == null) {
        return eventTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : eventTime_;
      } else {
        return eventTimeBuilder_.getMessage();
      }
    }
    /**
     *
     *
     * <pre>
     * Only required for
     * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
     * method. Timestamp of when the user event happened.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp event_time = 3;</code>
     */
    public Builder setEventTime(com.google.protobuf.Timestamp value) {
      if (eventTimeBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        eventTime_ = value;
      } else {
        eventTimeBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Only required for
     * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
     * method. Timestamp of when the user event happened.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp event_time = 3;</code>
     */
    public Builder setEventTime(com.google.protobuf.Timestamp.Builder builderForValue) {
      if (eventTimeBuilder_ == null) {
        eventTime_ = builderForValue.build();
      } else {
        eventTimeBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Only required for
     * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
     * method. Timestamp of when the user event happened.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp event_time = 3;</code>
     */
    public Builder mergeEventTime(com.google.protobuf.Timestamp value) {
      if (eventTimeBuilder_ == null) {
        if (((bitField0_ & 0x00000008) != 0)
            && eventTime_ != null
            && eventTime_ != com.google.protobuf.Timestamp.getDefaultInstance()) {
          getEventTimeBuilder().mergeFrom(value);
        } else {
          eventTime_ = value;
        }
      } else {
        eventTimeBuilder_.mergeFrom(value);
      }
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Only required for
     * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
     * method. Timestamp of when the user event happened.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp event_time = 3;</code>
     */
    public Builder clearEventTime() {
      bitField0_ = (bitField0_ & ~0x00000008);
      eventTime_ = null;
      if (eventTimeBuilder_ != null) {
        eventTimeBuilder_.dispose();
        eventTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Only required for
     * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
     * method. Timestamp of when the user event happened.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp event_time = 3;</code>
     */
    public com.google.protobuf.Timestamp.Builder getEventTimeBuilder() {
      bitField0_ |= 0x00000008;
      onChanged();
      return getEventTimeFieldBuilder().getBuilder();
    }
    /**
     *
     *
     * <pre>
     * Only required for
     * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
     * method. Timestamp of when the user event happened.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp event_time = 3;</code>
     */
    public com.google.protobuf.TimestampOrBuilder getEventTimeOrBuilder() {
      if (eventTimeBuilder_ != null) {
        return eventTimeBuilder_.getMessageOrBuilder();
      } else {
        return eventTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : eventTime_;
      }
    }
    /**
     *
     *
     * <pre>
     * Only required for
     * [UserEventService.ImportUserEvents][google.cloud.retail.v2alpha.UserEventService.ImportUserEvents]
     * method. Timestamp of when the user event happened.
     * </pre>
     *
     * <code>.google.protobuf.Timestamp event_time = 3;</code>
     */
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp,
            com.google.protobuf.Timestamp.Builder,
            com.google.protobuf.TimestampOrBuilder>
        getEventTimeFieldBuilder() {
      if (eventTimeBuilder_ == null) {
        eventTimeBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Timestamp,
                com.google.protobuf.Timestamp.Builder,
                com.google.protobuf.TimestampOrBuilder>(
                getEventTime(), getParentForChildren(), isClean());
        eventTime_ = null;
      }
      return eventTimeBuilder_;
    }

    private com.google.protobuf.LazyStringList experimentIds_ =
        com.google.protobuf.LazyStringArrayList.EMPTY;

    private void ensureExperimentIdsIsMutable() {
      if (!((bitField0_ & 0x00000010) != 0)) {
        experimentIds_ = new com.google.protobuf.LazyStringArrayList(experimentIds_);
        bitField0_ |= 0x00000010;
      }
    }
    /**
     *
     *
     * <pre>
     * A list of identifiers for the independent experiment groups this user event
     * belongs to. This is used to distinguish between user events associated with
     * different experiment setups (e.g. using Retail API, using different
     * recommendation models).
     * </pre>
     *
     * <code>repeated string experiment_ids = 4;</code>
     *
     * @return A list containing the experimentIds.
     */
    public com.google.protobuf.ProtocolStringList getExperimentIdsList() {
      return experimentIds_.getUnmodifiableView();
    }
    /**
     *
     *
     * <pre>
     * A list of identifiers for the independent experiment groups this user event
     * belongs to. This is used to distinguish between user events associated with
     * different experiment setups (e.g. using Retail API, using different
     * recommendation models).
     * </pre>
     *
     * <code>repeated string experiment_ids = 4;</code>
     *
     * @return The count of experimentIds.
     */
    public int getExperimentIdsCount() {
      return experimentIds_.size();
    }
    /**
     *
     *
     * <pre>
     * A list of identifiers for the independent experiment groups this user event
     * belongs to. This is used to distinguish between user events associated with
     * different experiment setups (e.g. using Retail API, using different
     * recommendation models).
     * </pre>
     *
     * <code>repeated string experiment_ids = 4;</code>
     *
     * @param index The index of the element to return.
     * @return The experimentIds at the given index.
     */
    public java.lang.String getExperimentIds(int index) {
      return experimentIds_.get(index);
    }
    /**
     *
     *
     * <pre>
     * A list of identifiers for the independent experiment groups this user event
     * belongs to. This is used to distinguish between user events associated with
     * different experiment setups (e.g. using Retail API, using different
     * recommendation models).
     * </pre>
     *
     * <code>repeated string experiment_ids = 4;</code>
     *
     * @param index The index of the value to return.
     * @return The bytes of the experimentIds at the given index.
     */
    public com.google.protobuf.ByteString getExperimentIdsBytes(int index) {
      return experimentIds_.getByteString(index);
    }
    /**
     *
     *
     * <pre>
     * A list of identifiers for the independent experiment groups this user event
     * belongs to. This is used to distinguish between user events associated with
     * different experiment setups (e.g. using Retail API, using different
     * recommendation models).
     * </pre>
     *
     * <code>repeated string experiment_ids = 4;</code>
     *
     * @param index The index to set the value at.
     * @param value The experimentIds to set.
     * @return This builder for chaining.
     */
    public Builder setExperimentIds(int index, java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      ensureExperimentIdsIsMutable();
      experimentIds_.set(index, value);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of identifiers for the independent experiment groups this user event
     * belongs to. This is used to distinguish between user events associated with
     * different experiment setups (e.g. using Retail API, using different
     * recommendation models).
     * </pre>
     *
     * <code>repeated string experiment_ids = 4;</code>
     *
     * @param value The experimentIds to add.
     * @return This builder for chaining.
     */
    public Builder addExperimentIds(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      ensureExperimentIdsIsMutable();
      experimentIds_.add(value);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of identifiers for the independent experiment groups this user event
     * belongs to. This is used to distinguish between user events associated with
     * different experiment setups (e.g. using Retail API, using different
     * recommendation models).
     * </pre>
     *
     * <code>repeated string experiment_ids = 4;</code>
     *
     * @param values The experimentIds to add.
     * @return This builder for chaining.
     */
    public Builder addAllExperimentIds(java.lang.Iterable<java.lang.String> values) {
      ensureExperimentIdsIsMutable();
      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, experimentIds_);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of identifiers for the independent experiment groups this user event
     * belongs to. This is used to distinguish between user events associated with
     * different experiment setups (e.g. using Retail API, using different
     * recommendation models).
     * </pre>
     *
     * <code>repeated string experiment_ids = 4;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearExperimentIds() {
      experimentIds_ = com.google.protobuf.LazyStringArrayList.EMPTY;
      bitField0_ = (bitField0_ & ~0x00000010);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of identifiers for the independent experiment groups this user event
     * belongs to. This is used to distinguish between user events associated with
     * different experiment setups (e.g. using Retail API, using different
     * recommendation models).
     * </pre>
     *
     * <code>repeated string experiment_ids = 4;</code>
     *
     * @param value The bytes of the experimentIds to add.
     * @return This builder for chaining.
     */
    public Builder addExperimentIdsBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      ensureExperimentIdsIsMutable();
      experimentIds_.add(value);
      onChanged();
      return this;
    }

    private java.lang.Object attributionToken_ = "";
    /**
     *
     *
     * <pre>
     * Highly recommended for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * This field enables accurate attribution of recommendation model
     * performance.
     * The value must be a valid
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * The value must be a valid
     * [SearchResponse.attribution_token][google.cloud.retail.v2alpha.SearchResponse.attribution_token]
     * for user events that are the result of
     * [SearchService.Search][google.cloud.retail.v2alpha.SearchService.Search].
     * This token enables us to accurately attribute page view or purchase back to
     * the event and the particular predict response containing this
     * clicked/purchased product. If user clicks on product K in the
     * recommendation results, pass
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * as a URL parameter to product K's page. When recording events on product
     * K's page, log the
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * to this field.
     * </pre>
     *
     * <code>string attribution_token = 5;</code>
     *
     * @return The attributionToken.
     */
    public java.lang.String getAttributionToken() {
      java.lang.Object ref = attributionToken_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        attributionToken_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Highly recommended for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * This field enables accurate attribution of recommendation model
     * performance.
     * The value must be a valid
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * The value must be a valid
     * [SearchResponse.attribution_token][google.cloud.retail.v2alpha.SearchResponse.attribution_token]
     * for user events that are the result of
     * [SearchService.Search][google.cloud.retail.v2alpha.SearchService.Search].
     * This token enables us to accurately attribute page view or purchase back to
     * the event and the particular predict response containing this
     * clicked/purchased product. If user clicks on product K in the
     * recommendation results, pass
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * as a URL parameter to product K's page. When recording events on product
     * K's page, log the
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * to this field.
     * </pre>
     *
     * <code>string attribution_token = 5;</code>
     *
     * @return The bytes for attributionToken.
     */
    public com.google.protobuf.ByteString getAttributionTokenBytes() {
      java.lang.Object ref = attributionToken_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        attributionToken_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Highly recommended for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * This field enables accurate attribution of recommendation model
     * performance.
     * The value must be a valid
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * The value must be a valid
     * [SearchResponse.attribution_token][google.cloud.retail.v2alpha.SearchResponse.attribution_token]
     * for user events that are the result of
     * [SearchService.Search][google.cloud.retail.v2alpha.SearchService.Search].
     * This token enables us to accurately attribute page view or purchase back to
     * the event and the particular predict response containing this
     * clicked/purchased product. If user clicks on product K in the
     * recommendation results, pass
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * as a URL parameter to product K's page. When recording events on product
     * K's page, log the
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * to this field.
     * </pre>
     *
     * <code>string attribution_token = 5;</code>
     *
     * @param value The attributionToken to set.
     * @return This builder for chaining.
     */
    public Builder setAttributionToken(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      attributionToken_ = value;
      bitField0_ |= 0x00000020;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Highly recommended for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * This field enables accurate attribution of recommendation model
     * performance.
     * The value must be a valid
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * The value must be a valid
     * [SearchResponse.attribution_token][google.cloud.retail.v2alpha.SearchResponse.attribution_token]
     * for user events that are the result of
     * [SearchService.Search][google.cloud.retail.v2alpha.SearchService.Search].
     * This token enables us to accurately attribute page view or purchase back to
     * the event and the particular predict response containing this
     * clicked/purchased product. If user clicks on product K in the
     * recommendation results, pass
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * as a URL parameter to product K's page. When recording events on product
     * K's page, log the
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * to this field.
     * </pre>
     *
     * <code>string attribution_token = 5;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearAttributionToken() {
      attributionToken_ = getDefaultInstance().getAttributionToken();
      bitField0_ = (bitField0_ & ~0x00000020);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Highly recommended for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * This field enables accurate attribution of recommendation model
     * performance.
     * The value must be a valid
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * for user events that are the result of
     * [PredictionService.Predict][google.cloud.retail.v2alpha.PredictionService.Predict].
     * The value must be a valid
     * [SearchResponse.attribution_token][google.cloud.retail.v2alpha.SearchResponse.attribution_token]
     * for user events that are the result of
     * [SearchService.Search][google.cloud.retail.v2alpha.SearchService.Search].
     * This token enables us to accurately attribute page view or purchase back to
     * the event and the particular predict response containing this
     * clicked/purchased product. If user clicks on product K in the
     * recommendation results, pass
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * as a URL parameter to product K's page. When recording events on product
     * K's page, log the
     * [PredictResponse.attribution_token][google.cloud.retail.v2alpha.PredictResponse.attribution_token]
     * to this field.
     * </pre>
     *
     * <code>string attribution_token = 5;</code>
     *
     * @param value The bytes for attributionToken to set.
     * @return This builder for chaining.
     */
    public Builder setAttributionTokenBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      attributionToken_ = value;
      bitField0_ |= 0x00000020;
      onChanged();
      return this;
    }

    private java.util.List<com.google.cloud.retail.v2alpha.ProductDetail> productDetails_ =
        java.util.Collections.emptyList();

    private void ensureProductDetailsIsMutable() {
      if (!((bitField0_ & 0x00000040) != 0)) {
        productDetails_ =
            new java.util.ArrayList<com.google.cloud.retail.v2alpha.ProductDetail>(productDetails_);
        bitField0_ |= 0x00000040;
      }
    }

    private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.retail.v2alpha.ProductDetail,
            com.google.cloud.retail.v2alpha.ProductDetail.Builder,
            com.google.cloud.retail.v2alpha.ProductDetailOrBuilder>
        productDetailsBuilder_;

    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public java.util.List<com.google.cloud.retail.v2alpha.ProductDetail> getProductDetailsList() {
      if (productDetailsBuilder_ == null) {
        return java.util.Collections.unmodifiableList(productDetails_);
      } else {
        return productDetailsBuilder_.getMessageList();
      }
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public int getProductDetailsCount() {
      if (productDetailsBuilder_ == null) {
        return productDetails_.size();
      } else {
        return productDetailsBuilder_.getCount();
      }
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public com.google.cloud.retail.v2alpha.ProductDetail getProductDetails(int index) {
      if (productDetailsBuilder_ == null) {
        return productDetails_.get(index);
      } else {
        return productDetailsBuilder_.getMessage(index);
      }
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public Builder setProductDetails(
        int index, com.google.cloud.retail.v2alpha.ProductDetail value) {
      if (productDetailsBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        ensureProductDetailsIsMutable();
        productDetails_.set(index, value);
        onChanged();
      } else {
        productDetailsBuilder_.setMessage(index, value);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public Builder setProductDetails(
        int index, com.google.cloud.retail.v2alpha.ProductDetail.Builder builderForValue) {
      if (productDetailsBuilder_ == null) {
        ensureProductDetailsIsMutable();
        productDetails_.set(index, builderForValue.build());
        onChanged();
      } else {
        productDetailsBuilder_.setMessage(index, builderForValue.build());
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public Builder addProductDetails(com.google.cloud.retail.v2alpha.ProductDetail value) {
      if (productDetailsBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        ensureProductDetailsIsMutable();
        productDetails_.add(value);
        onChanged();
      } else {
        productDetailsBuilder_.addMessage(value);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public Builder addProductDetails(
        int index, com.google.cloud.retail.v2alpha.ProductDetail value) {
      if (productDetailsBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        ensureProductDetailsIsMutable();
        productDetails_.add(index, value);
        onChanged();
      } else {
        productDetailsBuilder_.addMessage(index, value);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public Builder addProductDetails(
        com.google.cloud.retail.v2alpha.ProductDetail.Builder builderForValue) {
      if (productDetailsBuilder_ == null) {
        ensureProductDetailsIsMutable();
        productDetails_.add(builderForValue.build());
        onChanged();
      } else {
        productDetailsBuilder_.addMessage(builderForValue.build());
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public Builder addProductDetails(
        int index, com.google.cloud.retail.v2alpha.ProductDetail.Builder builderForValue) {
      if (productDetailsBuilder_ == null) {
        ensureProductDetailsIsMutable();
        productDetails_.add(index, builderForValue.build());
        onChanged();
      } else {
        productDetailsBuilder_.addMessage(index, builderForValue.build());
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public Builder addAllProductDetails(
        java.lang.Iterable<? extends com.google.cloud.retail.v2alpha.ProductDetail> values) {
      if (productDetailsBuilder_ == null) {
        ensureProductDetailsIsMutable();
        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, productDetails_);
        onChanged();
      } else {
        productDetailsBuilder_.addAllMessages(values);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public Builder clearProductDetails() {
      if (productDetailsBuilder_ == null) {
        productDetails_ = java.util.Collections.emptyList();
        bitField0_ = (bitField0_ & ~0x00000040);
        onChanged();
      } else {
        productDetailsBuilder_.clear();
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public Builder removeProductDetails(int index) {
      if (productDetailsBuilder_ == null) {
        ensureProductDetailsIsMutable();
        productDetails_.remove(index);
        onChanged();
      } else {
        productDetailsBuilder_.remove(index);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public com.google.cloud.retail.v2alpha.ProductDetail.Builder getProductDetailsBuilder(
        int index) {
      return getProductDetailsFieldBuilder().getBuilder(index);
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public com.google.cloud.retail.v2alpha.ProductDetailOrBuilder getProductDetailsOrBuilder(
        int index) {
      if (productDetailsBuilder_ == null) {
        return productDetails_.get(index);
      } else {
        return productDetailsBuilder_.getMessageOrBuilder(index);
      }
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public java.util.List<? extends com.google.cloud.retail.v2alpha.ProductDetailOrBuilder>
        getProductDetailsOrBuilderList() {
      if (productDetailsBuilder_ != null) {
        return productDetailsBuilder_.getMessageOrBuilderList();
      } else {
        return java.util.Collections.unmodifiableList(productDetails_);
      }
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public com.google.cloud.retail.v2alpha.ProductDetail.Builder addProductDetailsBuilder() {
      return getProductDetailsFieldBuilder()
          .addBuilder(com.google.cloud.retail.v2alpha.ProductDetail.getDefaultInstance());
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public com.google.cloud.retail.v2alpha.ProductDetail.Builder addProductDetailsBuilder(
        int index) {
      return getProductDetailsFieldBuilder()
          .addBuilder(index, com.google.cloud.retail.v2alpha.ProductDetail.getDefaultInstance());
    }
    /**
     *
     *
     * <pre>
     * The main product details related to the event.
     * This field is optional except for the following event types:
     * * `add-to-cart`
     * * `detail-page-view`
     * * `purchase-complete`
     * In a `search` event, this field represents the products returned to the end
     * user on the current page (the end user may have not finished browsing the
     * whole page yet). When a new page is returned to the end user, after
     * pagination/filtering/ordering even for the same query, a new `search` event
     * with different
     * [product_details][google.cloud.retail.v2alpha.UserEvent.product_details] is
     * desired. The end user may have not finished browsing the whole page yet.
     * </pre>
     *
     * <code>repeated .google.cloud.retail.v2alpha.ProductDetail product_details = 6;</code>
     */
    public java.util.List<com.google.cloud.retail.v2alpha.ProductDetail.Builder>
        getProductDetailsBuilderList() {
      return getProductDetailsFieldBuilder().getBuilderList();
    }

    private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.retail.v2alpha.ProductDetail,
            com.google.cloud.retail.v2alpha.ProductDetail.Builder,
            com.google.cloud.retail.v2alpha.ProductDetailOrBuilder>
        getProductDetailsFieldBuilder() {
      if (productDetailsBuilder_ == null) {
        productDetailsBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.retail.v2alpha.ProductDetail,
                com.google.cloud.retail.v2alpha.ProductDetail.Builder,
                com.google.cloud.retail.v2alpha.ProductDetailOrBuilder>(
                productDetails_,
                ((bitField0_ & 0x00000040) != 0),
                getParentForChildren(),
                isClean());
        productDetails_ = null;
      }
      return productDetailsBuilder_;
    }

    private com.google.cloud.retail.v2alpha.CompletionDetail completionDetail_;
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.retail.v2alpha.CompletionDetail,
            com.google.cloud.retail.v2alpha.CompletionDetail.Builder,
            com.google.cloud.retail.v2alpha.CompletionDetailOrBuilder>
        completionDetailBuilder_;
    /**
     *
     *
     * <pre>
     * The main auto-completion details related to the event.
     * This field should be set for `search` event when autocomplete function is
     * enabled and the user clicks a suggestion for search.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
     *
     * @return Whether the completionDetail field is set.
     */
    public boolean hasCompletionDetail() {
      return ((bitField0_ & 0x00000080) != 0);
    }
    /**
     *
     *
     * <pre>
     * The main auto-completion details related to the event.
     * This field should be set for `search` event when autocomplete function is
     * enabled and the user clicks a suggestion for search.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
     *
     * @return The completionDetail.
     */
    public com.google.cloud.retail.v2alpha.CompletionDetail getCompletionDetail() {
      if (completionDetailBuilder_ == null) {
        return completionDetail_ == null
            ? com.google.cloud.retail.v2alpha.CompletionDetail.getDefaultInstance()
            : completionDetail_;
      } else {
        return completionDetailBuilder_.getMessage();
      }
    }
    /**
     *
     *
     * <pre>
     * The main auto-completion details related to the event.
     * This field should be set for `search` event when autocomplete function is
     * enabled and the user clicks a suggestion for search.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
     */
    public Builder setCompletionDetail(com.google.cloud.retail.v2alpha.CompletionDetail value) {
      if (completionDetailBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        completionDetail_ = value;
      } else {
        completionDetailBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000080;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main auto-completion details related to the event.
     * This field should be set for `search` event when autocomplete function is
     * enabled and the user clicks a suggestion for search.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
     */
    public Builder setCompletionDetail(
        com.google.cloud.retail.v2alpha.CompletionDetail.Builder builderForValue) {
      if (completionDetailBuilder_ == null) {
        completionDetail_ = builderForValue.build();
      } else {
        completionDetailBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000080;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main auto-completion details related to the event.
     * This field should be set for `search` event when autocomplete function is
     * enabled and the user clicks a suggestion for search.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
     */
    public Builder mergeCompletionDetail(com.google.cloud.retail.v2alpha.CompletionDetail value) {
      if (completionDetailBuilder_ == null) {
        if (((bitField0_ & 0x00000080) != 0)
            && completionDetail_ != null
            && completionDetail_
                != com.google.cloud.retail.v2alpha.CompletionDetail.getDefaultInstance()) {
          getCompletionDetailBuilder().mergeFrom(value);
        } else {
          completionDetail_ = value;
        }
      } else {
        completionDetailBuilder_.mergeFrom(value);
      }
      bitField0_ |= 0x00000080;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main auto-completion details related to the event.
     * This field should be set for `search` event when autocomplete function is
     * enabled and the user clicks a suggestion for search.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
     */
    public Builder clearCompletionDetail() {
      bitField0_ = (bitField0_ & ~0x00000080);
      completionDetail_ = null;
      if (completionDetailBuilder_ != null) {
        completionDetailBuilder_.dispose();
        completionDetailBuilder_ = null;
      }
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The main auto-completion details related to the event.
     * This field should be set for `search` event when autocomplete function is
     * enabled and the user clicks a suggestion for search.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
     */
    public com.google.cloud.retail.v2alpha.CompletionDetail.Builder getCompletionDetailBuilder() {
      bitField0_ |= 0x00000080;
      onChanged();
      return getCompletionDetailFieldBuilder().getBuilder();
    }
    /**
     *
     *
     * <pre>
     * The main auto-completion details related to the event.
     * This field should be set for `search` event when autocomplete function is
     * enabled and the user clicks a suggestion for search.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
     */
    public com.google.cloud.retail.v2alpha.CompletionDetailOrBuilder
        getCompletionDetailOrBuilder() {
      if (completionDetailBuilder_ != null) {
        return completionDetailBuilder_.getMessageOrBuilder();
      } else {
        return completionDetail_ == null
            ? com.google.cloud.retail.v2alpha.CompletionDetail.getDefaultInstance()
            : completionDetail_;
      }
    }
    /**
     *
     *
     * <pre>
     * The main auto-completion details related to the event.
     * This field should be set for `search` event when autocomplete function is
     * enabled and the user clicks a suggestion for search.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.CompletionDetail completion_detail = 22;</code>
     */
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.retail.v2alpha.CompletionDetail,
            com.google.cloud.retail.v2alpha.CompletionDetail.Builder,
            com.google.cloud.retail.v2alpha.CompletionDetailOrBuilder>
        getCompletionDetailFieldBuilder() {
      if (completionDetailBuilder_ == null) {
        completionDetailBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.retail.v2alpha.CompletionDetail,
                com.google.cloud.retail.v2alpha.CompletionDetail.Builder,
                com.google.cloud.retail.v2alpha.CompletionDetailOrBuilder>(
                getCompletionDetail(), getParentForChildren(), isClean());
        completionDetail_ = null;
      }
      return completionDetailBuilder_;
    }

    private com.google.protobuf.MapField<
            java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
        attributes_;

    private com.google.protobuf.MapField<
            java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
        internalGetAttributes() {
      if (attributes_ == null) {
        return com.google.protobuf.MapField.emptyMapField(
            AttributesDefaultEntryHolder.defaultEntry);
      }
      return attributes_;
    }

    private com.google.protobuf.MapField<
            java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
        internalGetMutableAttributes() {
      if (attributes_ == null) {
        attributes_ =
            com.google.protobuf.MapField.newMapField(AttributesDefaultEntryHolder.defaultEntry);
      }
      if (!attributes_.isMutable()) {
        attributes_ = attributes_.copy();
      }
      bitField0_ |= 0x00000100;
      onChanged();
      return attributes_;
    }

    public int getAttributesCount() {
      return internalGetAttributes().getMap().size();
    }
    /**
     *
     *
     * <pre>
     * Extra user event features to include in the recommendation model.
     * If you provide custom attributes for ingested user events, also include
     * them in the user events that you associate with prediction requests. Custom
     * attribute formatting must be consistent between imported events and events
     * provided with prediction requests. This lets the Retail API use
     * those custom attributes when training models and serving predictions, which
     * helps improve recommendation quality.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * The key must be a UTF-8 encoded string with a length limit of 5,000
     *   characters.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a UTF-8 encoded string with a length limit of
     *   256 characters.
     * * For number attributes, at most 400 values are allowed.
     * For product recommendations, an example of extra user information is
     * traffic_channel, which is how a user arrives at the site. Users can arrive
     * at the site by coming to the site directly, coming through Google
     * search, or in other ways.
     * </pre>
     *
     * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
     */
    @java.lang.Override
    public boolean containsAttributes(java.lang.String key) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      return internalGetAttributes().getMap().containsKey(key);
    }
    /** Use {@link #getAttributesMap()} instead. */
    @java.lang.Override
    @java.lang.Deprecated
    public java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
        getAttributes() {
      return getAttributesMap();
    }
    /**
     *
     *
     * <pre>
     * Extra user event features to include in the recommendation model.
     * If you provide custom attributes for ingested user events, also include
     * them in the user events that you associate with prediction requests. Custom
     * attribute formatting must be consistent between imported events and events
     * provided with prediction requests. This lets the Retail API use
     * those custom attributes when training models and serving predictions, which
     * helps improve recommendation quality.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * The key must be a UTF-8 encoded string with a length limit of 5,000
     *   characters.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a UTF-8 encoded string with a length limit of
     *   256 characters.
     * * For number attributes, at most 400 values are allowed.
     * For product recommendations, an example of extra user information is
     * traffic_channel, which is how a user arrives at the site. Users can arrive
     * at the site by coming to the site directly, coming through Google
     * search, or in other ways.
     * </pre>
     *
     * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
     */
    @java.lang.Override
    public java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
        getAttributesMap() {
      return internalGetAttributes().getMap();
    }
    /**
     *
     *
     * <pre>
     * Extra user event features to include in the recommendation model.
     * If you provide custom attributes for ingested user events, also include
     * them in the user events that you associate with prediction requests. Custom
     * attribute formatting must be consistent between imported events and events
     * provided with prediction requests. This lets the Retail API use
     * those custom attributes when training models and serving predictions, which
     * helps improve recommendation quality.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * The key must be a UTF-8 encoded string with a length limit of 5,000
     *   characters.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a UTF-8 encoded string with a length limit of
     *   256 characters.
     * * For number attributes, at most 400 values are allowed.
     * For product recommendations, an example of extra user information is
     * traffic_channel, which is how a user arrives at the site. Users can arrive
     * at the site by coming to the site directly, coming through Google
     * search, or in other ways.
     * </pre>
     *
     * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
     */
    @java.lang.Override
    public /* nullable */ com.google.cloud.retail.v2alpha.CustomAttribute getAttributesOrDefault(
        java.lang.String key,
        /* nullable */
        com.google.cloud.retail.v2alpha.CustomAttribute defaultValue) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute> map =
          internalGetAttributes().getMap();
      return map.containsKey(key) ? map.get(key) : defaultValue;
    }
    /**
     *
     *
     * <pre>
     * Extra user event features to include in the recommendation model.
     * If you provide custom attributes for ingested user events, also include
     * them in the user events that you associate with prediction requests. Custom
     * attribute formatting must be consistent between imported events and events
     * provided with prediction requests. This lets the Retail API use
     * those custom attributes when training models and serving predictions, which
     * helps improve recommendation quality.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * The key must be a UTF-8 encoded string with a length limit of 5,000
     *   characters.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a UTF-8 encoded string with a length limit of
     *   256 characters.
     * * For number attributes, at most 400 values are allowed.
     * For product recommendations, an example of extra user information is
     * traffic_channel, which is how a user arrives at the site. Users can arrive
     * at the site by coming to the site directly, coming through Google
     * search, or in other ways.
     * </pre>
     *
     * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
     */
    @java.lang.Override
    public com.google.cloud.retail.v2alpha.CustomAttribute getAttributesOrThrow(
        java.lang.String key) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute> map =
          internalGetAttributes().getMap();
      if (!map.containsKey(key)) {
        throw new java.lang.IllegalArgumentException();
      }
      return map.get(key);
    }

    public Builder clearAttributes() {
      bitField0_ = (bitField0_ & ~0x00000100);
      internalGetMutableAttributes().getMutableMap().clear();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Extra user event features to include in the recommendation model.
     * If you provide custom attributes for ingested user events, also include
     * them in the user events that you associate with prediction requests. Custom
     * attribute formatting must be consistent between imported events and events
     * provided with prediction requests. This lets the Retail API use
     * those custom attributes when training models and serving predictions, which
     * helps improve recommendation quality.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * The key must be a UTF-8 encoded string with a length limit of 5,000
     *   characters.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a UTF-8 encoded string with a length limit of
     *   256 characters.
     * * For number attributes, at most 400 values are allowed.
     * For product recommendations, an example of extra user information is
     * traffic_channel, which is how a user arrives at the site. Users can arrive
     * at the site by coming to the site directly, coming through Google
     * search, or in other ways.
     * </pre>
     *
     * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
     */
    public Builder removeAttributes(java.lang.String key) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      internalGetMutableAttributes().getMutableMap().remove(key);
      return this;
    }
    /** Use alternate mutation accessors instead. */
    @java.lang.Deprecated
    public java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute>
        getMutableAttributes() {
      bitField0_ |= 0x00000100;
      return internalGetMutableAttributes().getMutableMap();
    }
    /**
     *
     *
     * <pre>
     * Extra user event features to include in the recommendation model.
     * If you provide custom attributes for ingested user events, also include
     * them in the user events that you associate with prediction requests. Custom
     * attribute formatting must be consistent between imported events and events
     * provided with prediction requests. This lets the Retail API use
     * those custom attributes when training models and serving predictions, which
     * helps improve recommendation quality.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * The key must be a UTF-8 encoded string with a length limit of 5,000
     *   characters.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a UTF-8 encoded string with a length limit of
     *   256 characters.
     * * For number attributes, at most 400 values are allowed.
     * For product recommendations, an example of extra user information is
     * traffic_channel, which is how a user arrives at the site. Users can arrive
     * at the site by coming to the site directly, coming through Google
     * search, or in other ways.
     * </pre>
     *
     * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
     */
    public Builder putAttributes(
        java.lang.String key, com.google.cloud.retail.v2alpha.CustomAttribute value) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      if (value == null) {
        throw new NullPointerException("map value");
      }
      internalGetMutableAttributes().getMutableMap().put(key, value);
      bitField0_ |= 0x00000100;
      return this;
    }
    /**
     *
     *
     * <pre>
     * Extra user event features to include in the recommendation model.
     * If you provide custom attributes for ingested user events, also include
     * them in the user events that you associate with prediction requests. Custom
     * attribute formatting must be consistent between imported events and events
     * provided with prediction requests. This lets the Retail API use
     * those custom attributes when training models and serving predictions, which
     * helps improve recommendation quality.
     * This field needs to pass all below criteria, otherwise an INVALID_ARGUMENT
     * error is returned:
     * * The key must be a UTF-8 encoded string with a length limit of 5,000
     *   characters.
     * * For text attributes, at most 400 values are allowed. Empty values are not
     *   allowed. Each value must be a UTF-8 encoded string with a length limit of
     *   256 characters.
     * * For number attributes, at most 400 values are allowed.
     * For product recommendations, an example of extra user information is
     * traffic_channel, which is how a user arrives at the site. Users can arrive
     * at the site by coming to the site directly, coming through Google
     * search, or in other ways.
     * </pre>
     *
     * <code>map&lt;string, .google.cloud.retail.v2alpha.CustomAttribute&gt; attributes = 7;</code>
     */
    public Builder putAllAttributes(
        java.util.Map<java.lang.String, com.google.cloud.retail.v2alpha.CustomAttribute> values) {
      internalGetMutableAttributes().getMutableMap().putAll(values);
      bitField0_ |= 0x00000100;
      return this;
    }

    private java.lang.Object cartId_ = "";
    /**
     *
     *
     * <pre>
     * The ID or name of the associated shopping cart. This ID is used
     * to associate multiple items added or present in the cart before purchase.
     * This can only be set for `add-to-cart`, `purchase-complete`, or
     * `shopping-cart-page-view` events.
     * </pre>
     *
     * <code>string cart_id = 8;</code>
     *
     * @return The cartId.
     */
    public java.lang.String getCartId() {
      java.lang.Object ref = cartId_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        cartId_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The ID or name of the associated shopping cart. This ID is used
     * to associate multiple items added or present in the cart before purchase.
     * This can only be set for `add-to-cart`, `purchase-complete`, or
     * `shopping-cart-page-view` events.
     * </pre>
     *
     * <code>string cart_id = 8;</code>
     *
     * @return The bytes for cartId.
     */
    public com.google.protobuf.ByteString getCartIdBytes() {
      java.lang.Object ref = cartId_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        cartId_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The ID or name of the associated shopping cart. This ID is used
     * to associate multiple items added or present in the cart before purchase.
     * This can only be set for `add-to-cart`, `purchase-complete`, or
     * `shopping-cart-page-view` events.
     * </pre>
     *
     * <code>string cart_id = 8;</code>
     *
     * @param value The cartId to set.
     * @return This builder for chaining.
     */
    public Builder setCartId(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      cartId_ = value;
      bitField0_ |= 0x00000200;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The ID or name of the associated shopping cart. This ID is used
     * to associate multiple items added or present in the cart before purchase.
     * This can only be set for `add-to-cart`, `purchase-complete`, or
     * `shopping-cart-page-view` events.
     * </pre>
     *
     * <code>string cart_id = 8;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearCartId() {
      cartId_ = getDefaultInstance().getCartId();
      bitField0_ = (bitField0_ & ~0x00000200);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The ID or name of the associated shopping cart. This ID is used
     * to associate multiple items added or present in the cart before purchase.
     * This can only be set for `add-to-cart`, `purchase-complete`, or
     * `shopping-cart-page-view` events.
     * </pre>
     *
     * <code>string cart_id = 8;</code>
     *
     * @param value The bytes for cartId to set.
     * @return This builder for chaining.
     */
    public Builder setCartIdBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      cartId_ = value;
      bitField0_ |= 0x00000200;
      onChanged();
      return this;
    }

    private com.google.cloud.retail.v2alpha.PurchaseTransaction purchaseTransaction_;
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.retail.v2alpha.PurchaseTransaction,
            com.google.cloud.retail.v2alpha.PurchaseTransaction.Builder,
            com.google.cloud.retail.v2alpha.PurchaseTransactionOrBuilder>
        purchaseTransactionBuilder_;
    /**
     *
     *
     * <pre>
     * A transaction represents the entire purchase transaction.
     * Required for `purchase-complete` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
     *
     * @return Whether the purchaseTransaction field is set.
     */
    public boolean hasPurchaseTransaction() {
      return ((bitField0_ & 0x00000400) != 0);
    }
    /**
     *
     *
     * <pre>
     * A transaction represents the entire purchase transaction.
     * Required for `purchase-complete` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
     *
     * @return The purchaseTransaction.
     */
    public com.google.cloud.retail.v2alpha.PurchaseTransaction getPurchaseTransaction() {
      if (purchaseTransactionBuilder_ == null) {
        return purchaseTransaction_ == null
            ? com.google.cloud.retail.v2alpha.PurchaseTransaction.getDefaultInstance()
            : purchaseTransaction_;
      } else {
        return purchaseTransactionBuilder_.getMessage();
      }
    }
    /**
     *
     *
     * <pre>
     * A transaction represents the entire purchase transaction.
     * Required for `purchase-complete` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
     */
    public Builder setPurchaseTransaction(
        com.google.cloud.retail.v2alpha.PurchaseTransaction value) {
      if (purchaseTransactionBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        purchaseTransaction_ = value;
      } else {
        purchaseTransactionBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000400;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A transaction represents the entire purchase transaction.
     * Required for `purchase-complete` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
     */
    public Builder setPurchaseTransaction(
        com.google.cloud.retail.v2alpha.PurchaseTransaction.Builder builderForValue) {
      if (purchaseTransactionBuilder_ == null) {
        purchaseTransaction_ = builderForValue.build();
      } else {
        purchaseTransactionBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000400;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A transaction represents the entire purchase transaction.
     * Required for `purchase-complete` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
     */
    public Builder mergePurchaseTransaction(
        com.google.cloud.retail.v2alpha.PurchaseTransaction value) {
      if (purchaseTransactionBuilder_ == null) {
        if (((bitField0_ & 0x00000400) != 0)
            && purchaseTransaction_ != null
            && purchaseTransaction_
                != com.google.cloud.retail.v2alpha.PurchaseTransaction.getDefaultInstance()) {
          getPurchaseTransactionBuilder().mergeFrom(value);
        } else {
          purchaseTransaction_ = value;
        }
      } else {
        purchaseTransactionBuilder_.mergeFrom(value);
      }
      bitField0_ |= 0x00000400;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A transaction represents the entire purchase transaction.
     * Required for `purchase-complete` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
     */
    public Builder clearPurchaseTransaction() {
      bitField0_ = (bitField0_ & ~0x00000400);
      purchaseTransaction_ = null;
      if (purchaseTransactionBuilder_ != null) {
        purchaseTransactionBuilder_.dispose();
        purchaseTransactionBuilder_ = null;
      }
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A transaction represents the entire purchase transaction.
     * Required for `purchase-complete` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
     */
    public com.google.cloud.retail.v2alpha.PurchaseTransaction.Builder
        getPurchaseTransactionBuilder() {
      bitField0_ |= 0x00000400;
      onChanged();
      return getPurchaseTransactionFieldBuilder().getBuilder();
    }
    /**
     *
     *
     * <pre>
     * A transaction represents the entire purchase transaction.
     * Required for `purchase-complete` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
     */
    public com.google.cloud.retail.v2alpha.PurchaseTransactionOrBuilder
        getPurchaseTransactionOrBuilder() {
      if (purchaseTransactionBuilder_ != null) {
        return purchaseTransactionBuilder_.getMessageOrBuilder();
      } else {
        return purchaseTransaction_ == null
            ? com.google.cloud.retail.v2alpha.PurchaseTransaction.getDefaultInstance()
            : purchaseTransaction_;
      }
    }
    /**
     *
     *
     * <pre>
     * A transaction represents the entire purchase transaction.
     * Required for `purchase-complete` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.PurchaseTransaction purchase_transaction = 9;</code>
     */
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.retail.v2alpha.PurchaseTransaction,
            com.google.cloud.retail.v2alpha.PurchaseTransaction.Builder,
            com.google.cloud.retail.v2alpha.PurchaseTransactionOrBuilder>
        getPurchaseTransactionFieldBuilder() {
      if (purchaseTransactionBuilder_ == null) {
        purchaseTransactionBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.retail.v2alpha.PurchaseTransaction,
                com.google.cloud.retail.v2alpha.PurchaseTransaction.Builder,
                com.google.cloud.retail.v2alpha.PurchaseTransactionOrBuilder>(
                getPurchaseTransaction(), getParentForChildren(), isClean());
        purchaseTransaction_ = null;
      }
      return purchaseTransactionBuilder_;
    }

    private java.lang.Object searchQuery_ = "";
    /**
     *
     *
     * <pre>
     * The user's search query.
     * See [SearchRequest.query][google.cloud.retail.v2alpha.SearchRequest.query]
     * for definition.
     * The value must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string search_query = 10;</code>
     *
     * @return The searchQuery.
     */
    public java.lang.String getSearchQuery() {
      java.lang.Object ref = searchQuery_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        searchQuery_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The user's search query.
     * See [SearchRequest.query][google.cloud.retail.v2alpha.SearchRequest.query]
     * for definition.
     * The value must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string search_query = 10;</code>
     *
     * @return The bytes for searchQuery.
     */
    public com.google.protobuf.ByteString getSearchQueryBytes() {
      java.lang.Object ref = searchQuery_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        searchQuery_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The user's search query.
     * See [SearchRequest.query][google.cloud.retail.v2alpha.SearchRequest.query]
     * for definition.
     * The value must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string search_query = 10;</code>
     *
     * @param value The searchQuery to set.
     * @return This builder for chaining.
     */
    public Builder setSearchQuery(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      searchQuery_ = value;
      bitField0_ |= 0x00000800;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The user's search query.
     * See [SearchRequest.query][google.cloud.retail.v2alpha.SearchRequest.query]
     * for definition.
     * The value must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string search_query = 10;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearSearchQuery() {
      searchQuery_ = getDefaultInstance().getSearchQuery();
      bitField0_ = (bitField0_ & ~0x00000800);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The user's search query.
     * See [SearchRequest.query][google.cloud.retail.v2alpha.SearchRequest.query]
     * for definition.
     * The value must be a UTF-8 encoded string with a length limit of 5,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string search_query = 10;</code>
     *
     * @param value The bytes for searchQuery to set.
     * @return This builder for chaining.
     */
    public Builder setSearchQueryBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      searchQuery_ = value;
      bitField0_ |= 0x00000800;
      onChanged();
      return this;
    }

    private java.lang.Object filter_ = "";
    /**
     *
     *
     * <pre>
     * The filter syntax consists of an expression language for constructing a
     * predicate from one or more fields of the products being filtered.
     * See
     * [SearchRequest.filter][google.cloud.retail.v2alpha.SearchRequest.filter]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string filter = 16;</code>
     *
     * @return The filter.
     */
    public java.lang.String getFilter() {
      java.lang.Object ref = filter_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        filter_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The filter syntax consists of an expression language for constructing a
     * predicate from one or more fields of the products being filtered.
     * See
     * [SearchRequest.filter][google.cloud.retail.v2alpha.SearchRequest.filter]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string filter = 16;</code>
     *
     * @return The bytes for filter.
     */
    public com.google.protobuf.ByteString getFilterBytes() {
      java.lang.Object ref = filter_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        filter_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The filter syntax consists of an expression language for constructing a
     * predicate from one or more fields of the products being filtered.
     * See
     * [SearchRequest.filter][google.cloud.retail.v2alpha.SearchRequest.filter]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string filter = 16;</code>
     *
     * @param value The filter to set.
     * @return This builder for chaining.
     */
    public Builder setFilter(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      filter_ = value;
      bitField0_ |= 0x00001000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The filter syntax consists of an expression language for constructing a
     * predicate from one or more fields of the products being filtered.
     * See
     * [SearchRequest.filter][google.cloud.retail.v2alpha.SearchRequest.filter]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string filter = 16;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearFilter() {
      filter_ = getDefaultInstance().getFilter();
      bitField0_ = (bitField0_ & ~0x00001000);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The filter syntax consists of an expression language for constructing a
     * predicate from one or more fields of the products being filtered.
     * See
     * [SearchRequest.filter][google.cloud.retail.v2alpha.SearchRequest.filter]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string filter = 16;</code>
     *
     * @param value The bytes for filter to set.
     * @return This builder for chaining.
     */
    public Builder setFilterBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      filter_ = value;
      bitField0_ |= 0x00001000;
      onChanged();
      return this;
    }

    private java.lang.Object orderBy_ = "";
    /**
     *
     *
     * <pre>
     * The order in which products are returned.
     * See
     * [SearchRequest.order_by][google.cloud.retail.v2alpha.SearchRequest.order_by]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * This can only be set for `search` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string order_by = 17;</code>
     *
     * @return The orderBy.
     */
    public java.lang.String getOrderBy() {
      java.lang.Object ref = orderBy_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        orderBy_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The order in which products are returned.
     * See
     * [SearchRequest.order_by][google.cloud.retail.v2alpha.SearchRequest.order_by]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * This can only be set for `search` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string order_by = 17;</code>
     *
     * @return The bytes for orderBy.
     */
    public com.google.protobuf.ByteString getOrderByBytes() {
      java.lang.Object ref = orderBy_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        orderBy_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The order in which products are returned.
     * See
     * [SearchRequest.order_by][google.cloud.retail.v2alpha.SearchRequest.order_by]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * This can only be set for `search` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string order_by = 17;</code>
     *
     * @param value The orderBy to set.
     * @return This builder for chaining.
     */
    public Builder setOrderBy(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      orderBy_ = value;
      bitField0_ |= 0x00002000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The order in which products are returned.
     * See
     * [SearchRequest.order_by][google.cloud.retail.v2alpha.SearchRequest.order_by]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * This can only be set for `search` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string order_by = 17;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearOrderBy() {
      orderBy_ = getDefaultInstance().getOrderBy();
      bitField0_ = (bitField0_ & ~0x00002000);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The order in which products are returned.
     * See
     * [SearchRequest.order_by][google.cloud.retail.v2alpha.SearchRequest.order_by]
     * for definition and syntax.
     * The value must be a UTF-8 encoded string with a length limit of 1,000
     * characters. Otherwise, an INVALID_ARGUMENT error is returned.
     * This can only be set for `search` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>string order_by = 17;</code>
     *
     * @param value The bytes for orderBy to set.
     * @return This builder for chaining.
     */
    public Builder setOrderByBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      orderBy_ = value;
      bitField0_ |= 0x00002000;
      onChanged();
      return this;
    }

    private int offset_;
    /**
     *
     *
     * <pre>
     * An integer that specifies the current offset for pagination (the 0-indexed
     * starting location, amongst the products deemed by the API as relevant).
     * See
     * [SearchRequest.offset][google.cloud.retail.v2alpha.SearchRequest.offset]
     * for definition.
     * If this field is negative, an INVALID_ARGUMENT is returned.
     * This can only be set for `search` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>int32 offset = 18;</code>
     *
     * @return The offset.
     */
    @java.lang.Override
    public int getOffset() {
      return offset_;
    }
    /**
     *
     *
     * <pre>
     * An integer that specifies the current offset for pagination (the 0-indexed
     * starting location, amongst the products deemed by the API as relevant).
     * See
     * [SearchRequest.offset][google.cloud.retail.v2alpha.SearchRequest.offset]
     * for definition.
     * If this field is negative, an INVALID_ARGUMENT is returned.
     * This can only be set for `search` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>int32 offset = 18;</code>
     *
     * @param value The offset to set.
     * @return This builder for chaining.
     */
    public Builder setOffset(int value) {

      offset_ = value;
      bitField0_ |= 0x00004000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * An integer that specifies the current offset for pagination (the 0-indexed
     * starting location, amongst the products deemed by the API as relevant).
     * See
     * [SearchRequest.offset][google.cloud.retail.v2alpha.SearchRequest.offset]
     * for definition.
     * If this field is negative, an INVALID_ARGUMENT is returned.
     * This can only be set for `search` events. Other event types should not set
     * this field. Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>int32 offset = 18;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearOffset() {
      bitField0_ = (bitField0_ & ~0x00004000);
      offset_ = 0;
      onChanged();
      return this;
    }

    private com.google.protobuf.LazyStringList pageCategories_ =
        com.google.protobuf.LazyStringArrayList.EMPTY;

    private void ensurePageCategoriesIsMutable() {
      if (!((bitField0_ & 0x00008000) != 0)) {
        pageCategories_ = new com.google.protobuf.LazyStringArrayList(pageCategories_);
        bitField0_ |= 0x00008000;
      }
    }
    /**
     *
     *
     * <pre>
     * The categories associated with a category page.
     * To represent full path of category, use '&gt;' sign to separate different
     * hierarchies. If '&gt;' is part of the category name, replace it with
     * other character(s).
     * Category pages include special pages such as sales or promotions. For
     * instance, a special sale page may have the category hierarchy:
     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
     * Required for `category-page-view` events. At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>repeated string page_categories = 11;</code>
     *
     * @return A list containing the pageCategories.
     */
    public com.google.protobuf.ProtocolStringList getPageCategoriesList() {
      return pageCategories_.getUnmodifiableView();
    }
    /**
     *
     *
     * <pre>
     * The categories associated with a category page.
     * To represent full path of category, use '&gt;' sign to separate different
     * hierarchies. If '&gt;' is part of the category name, replace it with
     * other character(s).
     * Category pages include special pages such as sales or promotions. For
     * instance, a special sale page may have the category hierarchy:
     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
     * Required for `category-page-view` events. At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>repeated string page_categories = 11;</code>
     *
     * @return The count of pageCategories.
     */
    public int getPageCategoriesCount() {
      return pageCategories_.size();
    }
    /**
     *
     *
     * <pre>
     * The categories associated with a category page.
     * To represent full path of category, use '&gt;' sign to separate different
     * hierarchies. If '&gt;' is part of the category name, replace it with
     * other character(s).
     * Category pages include special pages such as sales or promotions. For
     * instance, a special sale page may have the category hierarchy:
     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
     * Required for `category-page-view` events. At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>repeated string page_categories = 11;</code>
     *
     * @param index The index of the element to return.
     * @return The pageCategories at the given index.
     */
    public java.lang.String getPageCategories(int index) {
      return pageCategories_.get(index);
    }
    /**
     *
     *
     * <pre>
     * The categories associated with a category page.
     * To represent full path of category, use '&gt;' sign to separate different
     * hierarchies. If '&gt;' is part of the category name, replace it with
     * other character(s).
     * Category pages include special pages such as sales or promotions. For
     * instance, a special sale page may have the category hierarchy:
     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
     * Required for `category-page-view` events. At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>repeated string page_categories = 11;</code>
     *
     * @param index The index of the value to return.
     * @return The bytes of the pageCategories at the given index.
     */
    public com.google.protobuf.ByteString getPageCategoriesBytes(int index) {
      return pageCategories_.getByteString(index);
    }
    /**
     *
     *
     * <pre>
     * The categories associated with a category page.
     * To represent full path of category, use '&gt;' sign to separate different
     * hierarchies. If '&gt;' is part of the category name, replace it with
     * other character(s).
     * Category pages include special pages such as sales or promotions. For
     * instance, a special sale page may have the category hierarchy:
     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
     * Required for `category-page-view` events. At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>repeated string page_categories = 11;</code>
     *
     * @param index The index to set the value at.
     * @param value The pageCategories to set.
     * @return This builder for chaining.
     */
    public Builder setPageCategories(int index, java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      ensurePageCategoriesIsMutable();
      pageCategories_.set(index, value);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The categories associated with a category page.
     * To represent full path of category, use '&gt;' sign to separate different
     * hierarchies. If '&gt;' is part of the category name, replace it with
     * other character(s).
     * Category pages include special pages such as sales or promotions. For
     * instance, a special sale page may have the category hierarchy:
     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
     * Required for `category-page-view` events. At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>repeated string page_categories = 11;</code>
     *
     * @param value The pageCategories to add.
     * @return This builder for chaining.
     */
    public Builder addPageCategories(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      ensurePageCategoriesIsMutable();
      pageCategories_.add(value);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The categories associated with a category page.
     * To represent full path of category, use '&gt;' sign to separate different
     * hierarchies. If '&gt;' is part of the category name, replace it with
     * other character(s).
     * Category pages include special pages such as sales or promotions. For
     * instance, a special sale page may have the category hierarchy:
     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
     * Required for `category-page-view` events. At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>repeated string page_categories = 11;</code>
     *
     * @param values The pageCategories to add.
     * @return This builder for chaining.
     */
    public Builder addAllPageCategories(java.lang.Iterable<java.lang.String> values) {
      ensurePageCategoriesIsMutable();
      com.google.protobuf.AbstractMessageLite.Builder.addAll(values, pageCategories_);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The categories associated with a category page.
     * To represent full path of category, use '&gt;' sign to separate different
     * hierarchies. If '&gt;' is part of the category name, replace it with
     * other character(s).
     * Category pages include special pages such as sales or promotions. For
     * instance, a special sale page may have the category hierarchy:
     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
     * Required for `category-page-view` events. At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>repeated string page_categories = 11;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearPageCategories() {
      pageCategories_ = com.google.protobuf.LazyStringArrayList.EMPTY;
      bitField0_ = (bitField0_ & ~0x00008000);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The categories associated with a category page.
     * To represent full path of category, use '&gt;' sign to separate different
     * hierarchies. If '&gt;' is part of the category name, replace it with
     * other character(s).
     * Category pages include special pages such as sales or promotions. For
     * instance, a special sale page may have the category hierarchy:
     * "pageCategories" : ["Sales &gt; 2017 Black Friday Deals"].
     * Required for `category-page-view` events. At least one of
     * [search_query][google.cloud.retail.v2alpha.UserEvent.search_query] or
     * [page_categories][google.cloud.retail.v2alpha.UserEvent.page_categories] is
     * required for `search` events. Other event types should not set this field.
     * Otherwise, an INVALID_ARGUMENT error is returned.
     * </pre>
     *
     * <code>repeated string page_categories = 11;</code>
     *
     * @param value The bytes of the pageCategories to add.
     * @return This builder for chaining.
     */
    public Builder addPageCategoriesBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      ensurePageCategoriesIsMutable();
      pageCategories_.add(value);
      onChanged();
      return this;
    }

    private com.google.cloud.retail.v2alpha.UserInfo userInfo_;
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.retail.v2alpha.UserInfo,
            com.google.cloud.retail.v2alpha.UserInfo.Builder,
            com.google.cloud.retail.v2alpha.UserInfoOrBuilder>
        userInfoBuilder_;
    /**
     *
     *
     * <pre>
     * User information.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
     *
     * @return Whether the userInfo field is set.
     */
    public boolean hasUserInfo() {
      return ((bitField0_ & 0x00010000) != 0);
    }
    /**
     *
     *
     * <pre>
     * User information.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
     *
     * @return The userInfo.
     */
    public com.google.cloud.retail.v2alpha.UserInfo getUserInfo() {
      if (userInfoBuilder_ == null) {
        return userInfo_ == null
            ? com.google.cloud.retail.v2alpha.UserInfo.getDefaultInstance()
            : userInfo_;
      } else {
        return userInfoBuilder_.getMessage();
      }
    }
    /**
     *
     *
     * <pre>
     * User information.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
     */
    public Builder setUserInfo(com.google.cloud.retail.v2alpha.UserInfo value) {
      if (userInfoBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        userInfo_ = value;
      } else {
        userInfoBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00010000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * User information.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
     */
    public Builder setUserInfo(com.google.cloud.retail.v2alpha.UserInfo.Builder builderForValue) {
      if (userInfoBuilder_ == null) {
        userInfo_ = builderForValue.build();
      } else {
        userInfoBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00010000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * User information.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
     */
    public Builder mergeUserInfo(com.google.cloud.retail.v2alpha.UserInfo value) {
      if (userInfoBuilder_ == null) {
        if (((bitField0_ & 0x00010000) != 0)
            && userInfo_ != null
            && userInfo_ != com.google.cloud.retail.v2alpha.UserInfo.getDefaultInstance()) {
          getUserInfoBuilder().mergeFrom(value);
        } else {
          userInfo_ = value;
        }
      } else {
        userInfoBuilder_.mergeFrom(value);
      }
      bitField0_ |= 0x00010000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * User information.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
     */
    public Builder clearUserInfo() {
      bitField0_ = (bitField0_ & ~0x00010000);
      userInfo_ = null;
      if (userInfoBuilder_ != null) {
        userInfoBuilder_.dispose();
        userInfoBuilder_ = null;
      }
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * User information.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
     */
    public com.google.cloud.retail.v2alpha.UserInfo.Builder getUserInfoBuilder() {
      bitField0_ |= 0x00010000;
      onChanged();
      return getUserInfoFieldBuilder().getBuilder();
    }
    /**
     *
     *
     * <pre>
     * User information.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
     */
    public com.google.cloud.retail.v2alpha.UserInfoOrBuilder getUserInfoOrBuilder() {
      if (userInfoBuilder_ != null) {
        return userInfoBuilder_.getMessageOrBuilder();
      } else {
        return userInfo_ == null
            ? com.google.cloud.retail.v2alpha.UserInfo.getDefaultInstance()
            : userInfo_;
      }
    }
    /**
     *
     *
     * <pre>
     * User information.
     * </pre>
     *
     * <code>.google.cloud.retail.v2alpha.UserInfo user_info = 12;</code>
     */
    private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.retail.v2alpha.UserInfo,
            com.google.cloud.retail.v2alpha.UserInfo.Builder,
            com.google.cloud.retail.v2alpha.UserInfoOrBuilder>
        getUserInfoFieldBuilder() {
      if (userInfoBuilder_ == null) {
        userInfoBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.retail.v2alpha.UserInfo,
                com.google.cloud.retail.v2alpha.UserInfo.Builder,
                com.google.cloud.retail.v2alpha.UserInfoOrBuilder>(
                getUserInfo(), getParentForChildren(), isClean());
        userInfo_ = null;
      }
      return userInfoBuilder_;
    }

    private java.lang.Object uri_ = "";
    /**
     *
     *
     * <pre>
     * Complete URL (window.location.href) of the user's current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically. Maximum length 5,000
     * characters.
     * </pre>
     *
     * <code>string uri = 13;</code>
     *
     * @return The uri.
     */
    public java.lang.String getUri() {
      java.lang.Object ref = uri_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        uri_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Complete URL (window.location.href) of the user's current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically. Maximum length 5,000
     * characters.
     * </pre>
     *
     * <code>string uri = 13;</code>
     *
     * @return The bytes for uri.
     */
    public com.google.protobuf.ByteString getUriBytes() {
      java.lang.Object ref = uri_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        uri_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Complete URL (window.location.href) of the user's current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically. Maximum length 5,000
     * characters.
     * </pre>
     *
     * <code>string uri = 13;</code>
     *
     * @param value The uri to set.
     * @return This builder for chaining.
     */
    public Builder setUri(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      uri_ = value;
      bitField0_ |= 0x00020000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Complete URL (window.location.href) of the user's current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically. Maximum length 5,000
     * characters.
     * </pre>
     *
     * <code>string uri = 13;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearUri() {
      uri_ = getDefaultInstance().getUri();
      bitField0_ = (bitField0_ & ~0x00020000);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Complete URL (window.location.href) of the user's current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically. Maximum length 5,000
     * characters.
     * </pre>
     *
     * <code>string uri = 13;</code>
     *
     * @param value The bytes for uri to set.
     * @return This builder for chaining.
     */
    public Builder setUriBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      uri_ = value;
      bitField0_ |= 0x00020000;
      onChanged();
      return this;
    }

    private java.lang.Object referrerUri_ = "";
    /**
     *
     *
     * <pre>
     * The referrer URL of the current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string referrer_uri = 14;</code>
     *
     * @return The referrerUri.
     */
    public java.lang.String getReferrerUri() {
      java.lang.Object ref = referrerUri_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        referrerUri_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The referrer URL of the current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string referrer_uri = 14;</code>
     *
     * @return The bytes for referrerUri.
     */
    public com.google.protobuf.ByteString getReferrerUriBytes() {
      java.lang.Object ref = referrerUri_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        referrerUri_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The referrer URL of the current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string referrer_uri = 14;</code>
     *
     * @param value The referrerUri to set.
     * @return This builder for chaining.
     */
    public Builder setReferrerUri(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      referrerUri_ = value;
      bitField0_ |= 0x00040000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The referrer URL of the current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string referrer_uri = 14;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearReferrerUri() {
      referrerUri_ = getDefaultInstance().getReferrerUri();
      bitField0_ = (bitField0_ & ~0x00040000);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The referrer URL of the current page.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string referrer_uri = 14;</code>
     *
     * @param value The bytes for referrerUri to set.
     * @return This builder for chaining.
     */
    public Builder setReferrerUriBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      referrerUri_ = value;
      bitField0_ |= 0x00040000;
      onChanged();
      return this;
    }

    private java.lang.Object pageViewId_ = "";
    /**
     *
     *
     * <pre>
     * A unique ID of a web page view.
     * This should be kept the same for all user events triggered from the same
     * pageview. For example, an item detail page view could trigger multiple
     * events as the user is browsing the page. The `pageViewId` property should
     * be kept the same for all these events so that they can be grouped together
     * properly.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string page_view_id = 15;</code>
     *
     * @return The pageViewId.
     */
    public java.lang.String getPageViewId() {
      java.lang.Object ref = pageViewId_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        pageViewId_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * A unique ID of a web page view.
     * This should be kept the same for all user events triggered from the same
     * pageview. For example, an item detail page view could trigger multiple
     * events as the user is browsing the page. The `pageViewId` property should
     * be kept the same for all these events so that they can be grouped together
     * properly.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string page_view_id = 15;</code>
     *
     * @return The bytes for pageViewId.
     */
    public com.google.protobuf.ByteString getPageViewIdBytes() {
      java.lang.Object ref = pageViewId_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        pageViewId_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * A unique ID of a web page view.
     * This should be kept the same for all user events triggered from the same
     * pageview. For example, an item detail page view could trigger multiple
     * events as the user is browsing the page. The `pageViewId` property should
     * be kept the same for all these events so that they can be grouped together
     * properly.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string page_view_id = 15;</code>
     *
     * @param value The pageViewId to set.
     * @return This builder for chaining.
     */
    public Builder setPageViewId(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      pageViewId_ = value;
      bitField0_ |= 0x00080000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A unique ID of a web page view.
     * This should be kept the same for all user events triggered from the same
     * pageview. For example, an item detail page view could trigger multiple
     * events as the user is browsing the page. The `pageViewId` property should
     * be kept the same for all these events so that they can be grouped together
     * properly.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string page_view_id = 15;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearPageViewId() {
      pageViewId_ = getDefaultInstance().getPageViewId();
      bitField0_ = (bitField0_ & ~0x00080000);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * A unique ID of a web page view.
     * This should be kept the same for all user events triggered from the same
     * pageview. For example, an item detail page view could trigger multiple
     * events as the user is browsing the page. The `pageViewId` property should
     * be kept the same for all these events so that they can be grouped together
     * properly.
     * When using the client side event reporting with JavaScript pixel and Google
     * Tag Manager, this value is filled in automatically.
     * </pre>
     *
     * <code>string page_view_id = 15;</code>
     *
     * @param value The bytes for pageViewId to set.
     * @return This builder for chaining.
     */
    public Builder setPageViewIdBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      pageViewId_ = value;
      bitField0_ |= 0x00080000;
      onChanged();
      return this;
    }

    private java.lang.Object entity_ = "";
    /**
     *
     *
     * <pre>
     * The entity for customers that may run multiple different entities, domains,
     * sites or regions, for example, `Google US`, `Google Ads`, `Waymo`,
     * `google.com`, `youtube.com`, etc.
     * It is recommended to set this field to get better per-entity search,
     * completion and prediction results.
     * </pre>
     *
     * <code>string entity = 23;</code>
     *
     * @return The entity.
     */
    public java.lang.String getEntity() {
      java.lang.Object ref = entity_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        entity_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The entity for customers that may run multiple different entities, domains,
     * sites or regions, for example, `Google US`, `Google Ads`, `Waymo`,
     * `google.com`, `youtube.com`, etc.
     * It is recommended to set this field to get better per-entity search,
     * completion and prediction results.
     * </pre>
     *
     * <code>string entity = 23;</code>
     *
     * @return The bytes for entity.
     */
    public com.google.protobuf.ByteString getEntityBytes() {
      java.lang.Object ref = entity_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        entity_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The entity for customers that may run multiple different entities, domains,
     * sites or regions, for example, `Google US`, `Google Ads`, `Waymo`,
     * `google.com`, `youtube.com`, etc.
     * It is recommended to set this field to get better per-entity search,
     * completion and prediction results.
     * </pre>
     *
     * <code>string entity = 23;</code>
     *
     * @param value The entity to set.
     * @return This builder for chaining.
     */
    public Builder setEntity(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      entity_ = value;
      bitField0_ |= 0x00100000;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The entity for customers that may run multiple different entities, domains,
     * sites or regions, for example, `Google US`, `Google Ads`, `Waymo`,
     * `google.com`, `youtube.com`, etc.
     * It is recommended to set this field to get better per-entity search,
     * completion and prediction results.
     * </pre>
     *
     * <code>string entity = 23;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearEntity() {
      entity_ = getDefaultInstance().getEntity();
      bitField0_ = (bitField0_ & ~0x00100000);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The entity for customers that may run multiple different entities, domains,
     * sites or regions, for example, `Google US`, `Google Ads`, `Waymo`,
     * `google.com`, `youtube.com`, etc.
     * It is recommended to set this field to get better per-entity search,
     * completion and prediction results.
     * </pre>
     *
     * <code>string entity = 23;</code>
     *
     * @param value The bytes for entity to set.
     * @return This builder for chaining.
     */
    public Builder setEntityBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      entity_ = value;
      bitField0_ |= 0x00100000;
      onChanged();
      return this;
    }

    @java.lang.Override
    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.setUnknownFields(unknownFields);
    }

    @java.lang.Override
    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }

    // @@protoc_insertion_point(builder_scope:google.cloud.retail.v2alpha.UserEvent)
  }

  // @@protoc_insertion_point(class_scope:google.cloud.retail.v2alpha.UserEvent)
  private static final com.google.cloud.retail.v2alpha.UserEvent DEFAULT_INSTANCE;

  static {
    DEFAULT_INSTANCE = new com.google.cloud.retail.v2alpha.UserEvent();
  }

  public static com.google.cloud.retail.v2alpha.UserEvent getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }

  private static final com.google.protobuf.Parser<UserEvent> PARSER =
      new com.google.protobuf.AbstractParser<UserEvent>() {
        @java.lang.Override
        public UserEvent parsePartialFrom(
            com.google.protobuf.CodedInputStream input,
            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
            throws com.google.protobuf.InvalidProtocolBufferException {
          Builder builder = newBuilder();
          try {
            builder.mergeFrom(input, extensionRegistry);
          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
            throw e.setUnfinishedMessage(builder.buildPartial());
          } catch (com.google.protobuf.UninitializedMessageException e) {
            throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
          } catch (java.io.IOException e) {
            throw new com.google.protobuf.InvalidProtocolBufferException(e)
                .setUnfinishedMessage(builder.buildPartial());
          }
          return builder.buildPartial();
        }
      };

  public static com.google.protobuf.Parser<UserEvent> parser() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.protobuf.Parser<UserEvent> getParserForType() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.cloud.retail.v2alpha.UserEvent getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }
}