/*
 * 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/api/documentation.proto

package com.google.api;

/**
 *
 *
 * <pre>
 * `Documentation` provides the information for describing a service.
 * Example:
 * &lt;pre&gt;&lt;code&gt;documentation:
 *   summary: &gt;
 *     The Google Calendar API gives access
 *     to most calendar features.
 *   pages:
 *   - name: Overview
 *     content: &amp;#40;== include google/foo/overview.md ==&amp;#41;
 *   - name: Tutorial
 *     content: &amp;#40;== include google/foo/tutorial.md ==&amp;#41;
 *     subpages;
 *     - name: Java
 *       content: &amp;#40;== include google/foo/tutorial_java.md ==&amp;#41;
 *   rules:
 *   - selector: google.calendar.Calendar.Get
 *     description: &gt;
 *       ...
 *   - selector: google.calendar.Calendar.Put
 *     description: &gt;
 *       ...
 * &lt;/code&gt;&lt;/pre&gt;
 * Documentation is provided in markdown syntax. In addition to
 * standard markdown features, definition lists, tables and fenced
 * code blocks are supported. Section headers can be provided and are
 * interpreted relative to the section nesting of the context where
 * a documentation fragment is embedded.
 * Documentation from the IDL is merged with documentation defined
 * via the config at normalization time, where documentation provided
 * by config rules overrides IDL provided.
 * A number of constructs specific to the API platform are supported
 * in documentation text.
 * In order to reference a proto element, the following
 * notation can be used:
 * &lt;pre&gt;&lt;code&gt;&amp;#91;fully.qualified.proto.name]&amp;#91;]&lt;/code&gt;&lt;/pre&gt;
 * To override the display text used for the link, this can be used:
 * &lt;pre&gt;&lt;code&gt;&amp;#91;display text]&amp;#91;fully.qualified.proto.name]&lt;/code&gt;&lt;/pre&gt;
 * Text can be excluded from doc using the following notation:
 * &lt;pre&gt;&lt;code&gt;&amp;#40;-- internal comment --&amp;#41;&lt;/code&gt;&lt;/pre&gt;
 * A few directives are available in documentation. Note that
 * directives must appear on a single line to be properly
 * identified. The `include` directive includes a markdown file from
 * an external source:
 * &lt;pre&gt;&lt;code&gt;&amp;#40;== include path/to/file ==&amp;#41;&lt;/code&gt;&lt;/pre&gt;
 * The `resource_for` directive marks a message to be the resource of
 * a collection in REST view. If it is not specified, tools attempt
 * to infer the resource from the operations in a collection:
 * &lt;pre&gt;&lt;code&gt;&amp;#40;== resource_for v1.shelves.books ==&amp;#41;&lt;/code&gt;&lt;/pre&gt;
 * The directive `suppress_warning` does not directly affect documentation
 * and is documented together with service config validation.
 * </pre>
 *
 * Protobuf type {@code google.api.Documentation}
 */
public final class Documentation extends com.google.protobuf.GeneratedMessageV3
    implements
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  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
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  /**
   *
   *
   * <pre>
   * A short description of what the service does. The summary must be plain
   * text. It becomes the overview of the service displayed in Google Cloud
   * Console.
   * NOTE: This field is equivalent to the standard field `description`.
   * </pre>
   *
   * <code>string summary = 1;</code>
   *
   * @return The summary.
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  /**
   *
   *
   * <pre>
   * A short description of what the service does. The summary must be plain
   * text. It becomes the overview of the service displayed in Google Cloud
   * Console.
   * NOTE: This field is equivalent to the standard field `description`.
   * </pre>
   *
   * <code>string summary = 1;</code>
   *
   * @return The bytes for summary.
   */
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  /**
   *
   *
   * <pre>
   * The top level pages for the documentation set.
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   *
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   *
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   * <pre>
   * The top level pages for the documentation set.
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   *
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  /**
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   * <pre>
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   * <pre>
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   *
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   *
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   *
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  /**
   *
   *
   * <pre>
   * A list of documentation rules that apply to individual API elements.
   * **NOTE:** All service configuration rules follow "last one wins" order.
   * </pre>
   *
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  /**
   *
   *
   * <pre>
   * A list of documentation rules that apply to individual API elements.
   * **NOTE:** All service configuration rules follow "last one wins" order.
   * </pre>
   *
   * <code>repeated .google.api.DocumentationRule rules = 3;</code>
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  /**
   *
   *
   * <pre>
   * A list of documentation rules that apply to individual API elements.
   * **NOTE:** All service configuration rules follow "last one wins" order.
   * </pre>
   *
   * <code>repeated .google.api.DocumentationRule rules = 3;</code>
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  /**
   *
   *
   * <pre>
   * A list of documentation rules that apply to individual API elements.
   * **NOTE:** All service configuration rules follow "last one wins" order.
   * </pre>
   *
   * <code>repeated .google.api.DocumentationRule rules = 3;</code>
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    return rules_.get(index);
  }
  /**
   *
   *
   * <pre>
   * A list of documentation rules that apply to individual API elements.
   * **NOTE:** All service configuration rules follow "last one wins" order.
   * </pre>
   *
   * <code>repeated .google.api.DocumentationRule rules = 3;</code>
   */
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  @SuppressWarnings("serial")
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  /**
   *
   *
   * <pre>
   * The URL to the root of documentation.
   * </pre>
   *
   * <code>string documentation_root_url = 4;</code>
   *
   * @return The documentationRootUrl.
   */
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  /**
   *
   *
   * <pre>
   * The URL to the root of documentation.
   * </pre>
   *
   * <code>string documentation_root_url = 4;</code>
   *
   * @return The bytes for documentationRootUrl.
   */
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  @SuppressWarnings("serial")
  private volatile java.lang.Object serviceRootUrl_ = "";
  /**
   *
   *
   * <pre>
   * Specifies the service root url if the default one (the service name
   * from the yaml file) is not suitable. This can be seen in any fully
   * specified service urls as well as sections that show a base that other
   * urls are relative to.
   * </pre>
   *
   * <code>string service_root_url = 6;</code>
   *
   * @return The serviceRootUrl.
   */
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   *
   *
   * <pre>
   * Specifies the service root url if the default one (the service name
   * from the yaml file) is not suitable. This can be seen in any fully
   * specified service urls as well as sections that show a base that other
   * urls are relative to.
   * </pre>
   *
   * <code>string service_root_url = 6;</code>
   *
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  public static final int OVERVIEW_FIELD_NUMBER = 2;

  @SuppressWarnings("serial")
  private volatile java.lang.Object overview_ = "";
  /**
   *
   *
   * <pre>
   * Declares a single overview page. For example:
   * &lt;pre&gt;&lt;code&gt;documentation:
   *   summary: ...
   *   overview: &amp;#40;== include overview.md ==&amp;#41;
   * &lt;/code&gt;&lt;/pre&gt;
   * This is a shortcut for the following declaration (using pages style):
   * &lt;pre&gt;&lt;code&gt;documentation:
   *   summary: ...
   *   pages:
   *   - name: Overview
   *     content: &amp;#40;== include overview.md ==&amp;#41;
   * &lt;/code&gt;&lt;/pre&gt;
   * Note: you cannot specify both `overview` field and `pages` field.
   * </pre>
   *
   * <code>string overview = 2;</code>
   *
   * @return The overview.
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   * <pre>
   * Declares a single overview page. For example:
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   *   summary: ...
   *   overview: &amp;#40;== include overview.md ==&amp;#41;
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   *   summary: ...
   *   pages:
   *   - name: Overview
   *     content: &amp;#40;== include overview.md ==&amp;#41;
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   * Note: you cannot specify both `overview` field and `pages` field.
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   * <code>string overview = 2;</code>
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  /**
   *
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   * <pre>
   * `Documentation` provides the information for describing a service.
   * Example:
   * &lt;pre&gt;&lt;code&gt;documentation:
   *   summary: &gt;
   *     The Google Calendar API gives access
   *     to most calendar features.
   *   pages:
   *   - name: Overview
   *     content: &amp;#40;== include google/foo/overview.md ==&amp;#41;
   *   - name: Tutorial
   *     content: &amp;#40;== include google/foo/tutorial.md ==&amp;#41;
   *     subpages;
   *     - name: Java
   *       content: &amp;#40;== include google/foo/tutorial_java.md ==&amp;#41;
   *   rules:
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   *     description: &gt;
   *       ...
   *   - selector: google.calendar.Calendar.Put
   *     description: &gt;
   *       ...
   * &lt;/code&gt;&lt;/pre&gt;
   * Documentation is provided in markdown syntax. In addition to
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   * code blocks are supported. Section headers can be provided and are
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     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public int getRulesCount() {
      if (rulesBuilder_ == null) {
        return rules_.size();
      } else {
        return rulesBuilder_.getCount();
      }
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public com.google.api.DocumentationRule getRules(int index) {
      if (rulesBuilder_ == null) {
        return rules_.get(index);
      } else {
        return rulesBuilder_.getMessage(index);
      }
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public Builder setRules(int index, com.google.api.DocumentationRule value) {
      if (rulesBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        ensureRulesIsMutable();
        rules_.set(index, value);
        onChanged();
      } else {
        rulesBuilder_.setMessage(index, value);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public Builder setRules(int index, com.google.api.DocumentationRule.Builder builderForValue) {
      if (rulesBuilder_ == null) {
        ensureRulesIsMutable();
        rules_.set(index, builderForValue.build());
        onChanged();
      } else {
        rulesBuilder_.setMessage(index, builderForValue.build());
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public Builder addRules(com.google.api.DocumentationRule value) {
      if (rulesBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        ensureRulesIsMutable();
        rules_.add(value);
        onChanged();
      } else {
        rulesBuilder_.addMessage(value);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public Builder addRules(int index, com.google.api.DocumentationRule value) {
      if (rulesBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        ensureRulesIsMutable();
        rules_.add(index, value);
        onChanged();
      } else {
        rulesBuilder_.addMessage(index, value);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public Builder addRules(com.google.api.DocumentationRule.Builder builderForValue) {
      if (rulesBuilder_ == null) {
        ensureRulesIsMutable();
        rules_.add(builderForValue.build());
        onChanged();
      } else {
        rulesBuilder_.addMessage(builderForValue.build());
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public Builder addRules(int index, com.google.api.DocumentationRule.Builder builderForValue) {
      if (rulesBuilder_ == null) {
        ensureRulesIsMutable();
        rules_.add(index, builderForValue.build());
        onChanged();
      } else {
        rulesBuilder_.addMessage(index, builderForValue.build());
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public Builder addAllRules(
        java.lang.Iterable<? extends com.google.api.DocumentationRule> values) {
      if (rulesBuilder_ == null) {
        ensureRulesIsMutable();
        com.google.protobuf.AbstractMessageLite.Builder.addAll(values, rules_);
        onChanged();
      } else {
        rulesBuilder_.addAllMessages(values);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public Builder clearRules() {
      if (rulesBuilder_ == null) {
        rules_ = java.util.Collections.emptyList();
        bitField0_ = (bitField0_ & ~0x00000004);
        onChanged();
      } else {
        rulesBuilder_.clear();
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public Builder removeRules(int index) {
      if (rulesBuilder_ == null) {
        ensureRulesIsMutable();
        rules_.remove(index);
        onChanged();
      } else {
        rulesBuilder_.remove(index);
      }
      return this;
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public com.google.api.DocumentationRule.Builder getRulesBuilder(int index) {
      return getRulesFieldBuilder().getBuilder(index);
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public com.google.api.DocumentationRuleOrBuilder getRulesOrBuilder(int index) {
      if (rulesBuilder_ == null) {
        return rules_.get(index);
      } else {
        return rulesBuilder_.getMessageOrBuilder(index);
      }
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public java.util.List<? extends com.google.api.DocumentationRuleOrBuilder>
        getRulesOrBuilderList() {
      if (rulesBuilder_ != null) {
        return rulesBuilder_.getMessageOrBuilderList();
      } else {
        return java.util.Collections.unmodifiableList(rules_);
      }
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public com.google.api.DocumentationRule.Builder addRulesBuilder() {
      return getRulesFieldBuilder()
          .addBuilder(com.google.api.DocumentationRule.getDefaultInstance());
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public com.google.api.DocumentationRule.Builder addRulesBuilder(int index) {
      return getRulesFieldBuilder()
          .addBuilder(index, com.google.api.DocumentationRule.getDefaultInstance());
    }
    /**
     *
     *
     * <pre>
     * A list of documentation rules that apply to individual API elements.
     * **NOTE:** All service configuration rules follow "last one wins" order.
     * </pre>
     *
     * <code>repeated .google.api.DocumentationRule rules = 3;</code>
     */
    public java.util.List<com.google.api.DocumentationRule.Builder> getRulesBuilderList() {
      return getRulesFieldBuilder().getBuilderList();
    }

    private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.api.DocumentationRule,
            com.google.api.DocumentationRule.Builder,
            com.google.api.DocumentationRuleOrBuilder>
        getRulesFieldBuilder() {
      if (rulesBuilder_ == null) {
        rulesBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.api.DocumentationRule,
                com.google.api.DocumentationRule.Builder,
                com.google.api.DocumentationRuleOrBuilder>(
                rules_, ((bitField0_ & 0x00000004) != 0), getParentForChildren(), isClean());
        rules_ = null;
      }
      return rulesBuilder_;
    }

    private java.lang.Object documentationRootUrl_ = "";
    /**
     *
     *
     * <pre>
     * The URL to the root of documentation.
     * </pre>
     *
     * <code>string documentation_root_url = 4;</code>
     *
     * @return The documentationRootUrl.
     */
    public java.lang.String getDocumentationRootUrl() {
      java.lang.Object ref = documentationRootUrl_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        documentationRootUrl_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The URL to the root of documentation.
     * </pre>
     *
     * <code>string documentation_root_url = 4;</code>
     *
     * @return The bytes for documentationRootUrl.
     */
    public com.google.protobuf.ByteString getDocumentationRootUrlBytes() {
      java.lang.Object ref = documentationRootUrl_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        documentationRootUrl_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * The URL to the root of documentation.
     * </pre>
     *
     * <code>string documentation_root_url = 4;</code>
     *
     * @param value The documentationRootUrl to set.
     * @return This builder for chaining.
     */
    public Builder setDocumentationRootUrl(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      documentationRootUrl_ = value;
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The URL to the root of documentation.
     * </pre>
     *
     * <code>string documentation_root_url = 4;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearDocumentationRootUrl() {
      documentationRootUrl_ = getDefaultInstance().getDocumentationRootUrl();
      bitField0_ = (bitField0_ & ~0x00000008);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * The URL to the root of documentation.
     * </pre>
     *
     * <code>string documentation_root_url = 4;</code>
     *
     * @param value The bytes for documentationRootUrl to set.
     * @return This builder for chaining.
     */
    public Builder setDocumentationRootUrlBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      documentationRootUrl_ = value;
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }

    private java.lang.Object serviceRootUrl_ = "";
    /**
     *
     *
     * <pre>
     * Specifies the service root url if the default one (the service name
     * from the yaml file) is not suitable. This can be seen in any fully
     * specified service urls as well as sections that show a base that other
     * urls are relative to.
     * </pre>
     *
     * <code>string service_root_url = 6;</code>
     *
     * @return The serviceRootUrl.
     */
    public java.lang.String getServiceRootUrl() {
      java.lang.Object ref = serviceRootUrl_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        serviceRootUrl_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Specifies the service root url if the default one (the service name
     * from the yaml file) is not suitable. This can be seen in any fully
     * specified service urls as well as sections that show a base that other
     * urls are relative to.
     * </pre>
     *
     * <code>string service_root_url = 6;</code>
     *
     * @return The bytes for serviceRootUrl.
     */
    public com.google.protobuf.ByteString getServiceRootUrlBytes() {
      java.lang.Object ref = serviceRootUrl_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        serviceRootUrl_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Specifies the service root url if the default one (the service name
     * from the yaml file) is not suitable. This can be seen in any fully
     * specified service urls as well as sections that show a base that other
     * urls are relative to.
     * </pre>
     *
     * <code>string service_root_url = 6;</code>
     *
     * @param value The serviceRootUrl to set.
     * @return This builder for chaining.
     */
    public Builder setServiceRootUrl(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      serviceRootUrl_ = value;
      bitField0_ |= 0x00000010;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Specifies the service root url if the default one (the service name
     * from the yaml file) is not suitable. This can be seen in any fully
     * specified service urls as well as sections that show a base that other
     * urls are relative to.
     * </pre>
     *
     * <code>string service_root_url = 6;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearServiceRootUrl() {
      serviceRootUrl_ = getDefaultInstance().getServiceRootUrl();
      bitField0_ = (bitField0_ & ~0x00000010);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Specifies the service root url if the default one (the service name
     * from the yaml file) is not suitable. This can be seen in any fully
     * specified service urls as well as sections that show a base that other
     * urls are relative to.
     * </pre>
     *
     * <code>string service_root_url = 6;</code>
     *
     * @param value The bytes for serviceRootUrl to set.
     * @return This builder for chaining.
     */
    public Builder setServiceRootUrlBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      serviceRootUrl_ = value;
      bitField0_ |= 0x00000010;
      onChanged();
      return this;
    }

    private java.lang.Object overview_ = "";
    /**
     *
     *
     * <pre>
     * Declares a single overview page. For example:
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   overview: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * This is a shortcut for the following declaration (using pages style):
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   pages:
     *   - name: Overview
     *     content: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * Note: you cannot specify both `overview` field and `pages` field.
     * </pre>
     *
     * <code>string overview = 2;</code>
     *
     * @return The overview.
     */
    public java.lang.String getOverview() {
      java.lang.Object ref = overview_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        overview_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Declares a single overview page. For example:
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   overview: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * This is a shortcut for the following declaration (using pages style):
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   pages:
     *   - name: Overview
     *     content: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * Note: you cannot specify both `overview` field and `pages` field.
     * </pre>
     *
     * <code>string overview = 2;</code>
     *
     * @return The bytes for overview.
     */
    public com.google.protobuf.ByteString getOverviewBytes() {
      java.lang.Object ref = overview_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        overview_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
    /**
     *
     *
     * <pre>
     * Declares a single overview page. For example:
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   overview: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * This is a shortcut for the following declaration (using pages style):
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   pages:
     *   - name: Overview
     *     content: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * Note: you cannot specify both `overview` field and `pages` field.
     * </pre>
     *
     * <code>string overview = 2;</code>
     *
     * @param value The overview to set.
     * @return This builder for chaining.
     */
    public Builder setOverview(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      overview_ = value;
      bitField0_ |= 0x00000020;
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Declares a single overview page. For example:
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   overview: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * This is a shortcut for the following declaration (using pages style):
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   pages:
     *   - name: Overview
     *     content: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * Note: you cannot specify both `overview` field and `pages` field.
     * </pre>
     *
     * <code>string overview = 2;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearOverview() {
      overview_ = getDefaultInstance().getOverview();
      bitField0_ = (bitField0_ & ~0x00000020);
      onChanged();
      return this;
    }
    /**
     *
     *
     * <pre>
     * Declares a single overview page. For example:
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   overview: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * This is a shortcut for the following declaration (using pages style):
     * &lt;pre&gt;&lt;code&gt;documentation:
     *   summary: ...
     *   pages:
     *   - name: Overview
     *     content: &amp;#40;== include overview.md ==&amp;#41;
     * &lt;/code&gt;&lt;/pre&gt;
     * Note: you cannot specify both `overview` field and `pages` field.
     * </pre>
     *
     * <code>string overview = 2;</code>
     *
     * @param value The bytes for overview to set.
     * @return This builder for chaining.
     */
    public Builder setOverviewBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      overview_ = value;
      bitField0_ |= 0x00000020;
      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.api.Documentation)
  }

  // @@protoc_insertion_point(class_scope:google.api.Documentation)
  private static final com.google.api.Documentation DEFAULT_INSTANCE;

  static {
    DEFAULT_INSTANCE = new com.google.api.Documentation();
  }

  public static com.google.api.Documentation getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }

  private static final com.google.protobuf.Parser<Documentation> PARSER =
      new com.google.protobuf.AbstractParser<Documentation>() {
        @java.lang.Override
        public Documentation 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<Documentation> parser() {
    return PARSER;
  }

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

  @java.lang.Override
  public com.google.api.Documentation getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }
}