| // 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.md file. | |
| // @dart=2.9 | |
| class Mixin { | |
| var field; | |
| } | |
| class A extends Object with Mixin, Mixin {} |