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

typedef C<A extends core::Object, K extends core::Object> = <B extends core::Object>(A, K, B) → core::int;
typedef D<K extends core::Object> = <A extends core::Object>(core::int) → <B extends core::Object>(A, K, B) → core::int;
static method producer<K extends core::Object>() → dynamic
  ;
static method main() → dynamic
  ;