| // Copyright (c) 2025, 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 SuperBase<T, U> {} | |
| abstract class Base<T> extends SuperBase<T, String> { | |
| T method1(); | |
| } |