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

import "dart:async";

class X extends core::Object {
  final field dynamic x;
  final field dynamic y;
  constructor •(dynamic x, dynamic y) → self::X
    ;
  method toString() → core::String
    ;
}
class Y extends core::Object {
  synthetic constructor •() → self::Y
    ;
  method f(dynamic _) → dynamic
    ;
}
static method f1() → asy::Future<core::List<core::Object>>
  ;
static method f2() → core::List<core::Object>
  ;
static method f3() → asy::Future<core::Object>
  ;
static method foo() → asy::Future<self::X>
  ;
static method main() → asy::Future<void>
  ;