refresh method

@override Future<bool> refresh([ bool notifyStateChanged = false ])

Implementation

@override
Future<bool> refresh([bool notifyStateChanged = false]) async {
  if (notifyStateChanged) {
    clear();
    isLoading = false;
    indicatorStatus = IndicatorStatus.fullScreenBusying;
    onStateChanged(this);
  }
  return await _innerloadData();
}