| // Copyright (c) 2022, 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. | |
| import 'package:expect/expect.dart'; | |
| class _Thing {} | |
| Object create() => _Thing(); | |
| void check(Object o) { | |
| Expect.isTrue(o is _Thing); | |
| } |