library /*isNonNullableByDefault*/;
import self as self;
import "dart:core" as core;
import "dart:async" as asy;

import "dart:async";

class C extends core::Object {
  synthetic constructor •() → self::C
    : super core::Object::•()
    ;
  method m() → asy::Future<core::List<core::int>> async 
    return let final core::List<core::int> #t1 = <core::int>[] in block {
      #t1.{core::List::add}(await this.{self::C::_m}(){() → asy::Future<core::int>}){(core::int) → void};
    } =>#t1;
  method _m() → asy::Future<core::int> async 
    return 42;
}
static method main() → dynamic async {
  self::expect(42, (await new self::C::•().{self::C::m}(){() → asy::Future<core::List<core::int>>}).{core::Iterable::first}{core::int});
}
static method expect(dynamic expected, dynamic actual) → dynamic {
  if(!(expected =={core::Object::==}{(core::Object) → core::bool} actual))
    throw "Expected ${expected}, actual ${actual}";
}