| # asyncWait method | |
| [HandleWaiter](../../zircon/HandleWaiter-class.md) asyncWait | |
| (int signals, [AsyncWaitCallback](../../zircon/AsyncWaitCallback.md) callback) | |
| ## Implementation | |
| ```dart | |
| HandleWaiter asyncWait(int signals, AsyncWaitCallback callback) { | |
| throw UnimplementedError( | |
| 'Handle.asyncWait() is not implemented on this platform.'); | |
| } | |
| ``` | |