dispose method

Implementation

@override
dispose() {
  assert(() {
    if (_ticker == null) {
      throw FlutterError.fromParts(<DiagnosticsNode>[
        ErrorSummary(
            'FanjiaoDanmuController.dispose() called more than once.'),
        ErrorDescription(
            'A given $runtimeType cannot be disposed more than once.\n'),
        foundation.DiagnosticsProperty<DanmuController<T>>(
          'The following $runtimeType object was disposed multiple times',
          this,
          style: foundation.DiagnosticsTreeStyle.errorProperty,
        ),
      ]);
    }
    return true;
  }());
  _ticker!.dispose();
  _ticker = null;
  _lastElapsedDuration = null;
  _status = DanmuStatus.dispose;
  clearTickListeners();
  clearStatusListeners();
  clearListeners();
  clearDanmu();
  super.dispose();
}