|  | // 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 file. | 
|  |  | 
|  | part of regress_25389; | 
|  |  | 
|  | abstract class ComponentState<S extends ComponentState> {} | 
|  |  | 
|  | abstract class AbstractListEditorState<D, | 
|  | S extends AbstractListEditorState<D, S>> extends ComponentState<S> {} | 
|  |  | 
|  | class IssueListEditorState | 
|  | extends AbstractListEditorState<String, IssueListEditorState> | 
|  | implements ComponentState<IssueListEditorState> {} | 
|  |  |