| // Copyright (c) 2026, 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. | |
| abstract class Greeter { | |
| static String greeting() => 'Hello, world!'; | |
| String message(); | |
| void greet() => print(message()); | |
| } | |
| class WorldGreeter extends Greeter { | |
| @override | |
| String message() => Greeter.greeting(); | |
| } | |
| void main() => WorldGreeter().greet(); |