blob: ffb5b00f495c4b32519631f5aba17518698d43ca [file] [log] [blame]
// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// @dart = 2.9
import 'dart:async';
class Base {
Future<int> method() async {
throw 'Should be unused';
}
}
class Sub1 extends Base {
Future<int> method() async {
return 1;
}
}
class Sub2 extends Base {
Future<int> method() async {
return 2;
}
}
help(Base object) async {
print(await object.method());
}
main() async {
await help(new Sub1());
await help(new Sub2());
}