| // Copyright (c) 2018, 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. |
| |
| // @dart = 2.9 |
| |
| typedef void RecognizerCallback<T>(); |
| typedef void GestureTapCancelCallback(); |
| GestureTapCancelCallback onTapCancel; |
| T invokeCallback<T>(String name, RecognizerCallback<T> callback, |
| {String debugReport()}) {} |
| main() { |
| invokeCallback<void>('spontaneous onTapCancel', onTapCancel); |
| } |
