pkg/front_end/testcases/extension_types/issue54649_2.dart.textual_outline.expect

import 'dart:async';

extension type E1(Future<int> it) {}

extension type E2(Future<int> it) implements E1, Future<int> {}

extension type E3(Future<int> it) implements Future<int> {}

test1<X extends E1, Y extends E2>(X x) async {}

test2<X extends FutureOr<E1>, Y extends E1>(X x) async {}

test3<X extends E3?, Y extends E3>(X x) async {}

test4<X extends E1, Y extends X>(X x) async {}