changed method

Implementation

void changed() {
  // Removed FDataSet.Active check, needed for Persistent fields (see
  // bug ID 30954) (original comment kept as-is)
  if (_dataSet != null &&
      !_dataSet!.componentState
          .contains(TComponentStateItem.csDestroying)) {
    _dataSet!.dataEvent(TDataEvent.deFieldListChange, 0);
  }
  onChange?.call(this);
}