library /*isNonNullableByDefault*/;
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
  ;
static method main() → dynamic
  ;