digraph "ABI diff" {
  "0" [shape=rectangle, label="'interface'"]
  "1" [color=red, label="removed(int bar_1(const volatile struct foo*))"]
  "0" -> "1" [label=""]
  "2" [color=red, label="added(int bar_2(struct foo*))"]
  "0" -> "2" [label=""]
  "3" [label="'int bar(struct foo)' → 'int bar(const volatile struct foo*)'"]
  "4" [label="'int(struct foo)' → 'int(const volatile struct foo*)'"]
  "5" [color=red, label="'struct foo' → 'const volatile struct foo*'"]
  "4" -> "5" [label="parameter 1"]
  "3" -> "4" [label=""]
  "0" -> "3" [label=""]
  "6" [label="'int baz(int(*)(struct foo))' → 'int baz(int(*)(const volatile struct foo*))'"]
  "7" [label="'int(int(*)(struct foo))' → 'int(int(*)(const volatile struct foo*))'"]
  "8" [label="'int(*)(struct foo)' → 'int(*)(const volatile struct foo*)'"]
  "9" [label="'int(struct foo)' → 'int(const volatile struct foo*)'"]
  "9" -> "5" [label="parameter 1"]
  "8" -> "9" [label="pointed-to"]
  "7" -> "8" [label="parameter 1"]
  "6" -> "7" [label=""]
  "0" -> "6" [label=""]
  "10" [label="'int(* quux)(struct foo)' → 'int(* volatile const quux)(const volatile struct foo*)'"]
  "11" [color=red, label="'int(*)(struct foo)' → 'int(* volatile const)(const volatile struct foo*)'"]
  "11" -> "11:0"
  "11:0" [color=red, label="qualifier const added"]
  "11" -> "11:1"
  "11:1" [color=red, label="qualifier volatile added"]
  "11" -> "8" [label="underlying"]
  "10" -> "11" [label=""]
  "0" -> "10" [label=""]
}