library;
import self as self;
import "dart:core" as core;

typedef C<contravariant A extends core::Object* = dynamic, contravariant K extends core::Object* = dynamic> = <B extends core::Object* = dynamic>(A*, K*, B*) →* core::int*;
typedef D<contravariant K extends core::Object* = dynamic> = <A extends core::Object* = dynamic>(core::int*) →* <B extends core::Object* = dynamic>(A*, K*, B*) →* core::int*;
static method producer<K extends core::Object* = dynamic>() → dynamic {
  return <A extends core::Object* = dynamic>(core::int* v1) → <B extends core::Object* = dynamic>(A*, self::producer::K*, B*) →* core::int* {
    return <B extends core::Object* = dynamic>(A* v2, self::producer::K* v3, B* v4) → core::int* => 0;
  };
}
static method main() → dynamic {
  assert(self::producer<core::String*>() is <A extends core::Object* = dynamic>(core::int*) →* <B extends core::Object* = dynamic>(A*, core::String*, B*) →* core::int*);
}