| // Copyright (c) 2020, 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. | |
| final elements = <C>[c, d, e, f, null]; | |
| class C {} | |
| class D extends C {} | |
| class E extends C {} | |
| class F implements D, E {} | |
| final c = C(); | |
| final d = D(); | |
| final e = E(); | |
| final f = F(); |