save method

@override Future<void> save()

Data stored in the model is stored in a database external to the app that is tied to the model.

The updated Resuult can be obtained at the stage where the loading is finished.

Implementation

@override
Future<void> save() async {
  if (_saveCompleter != null) {
    return saving;
  }
  _saveCompleter = Completer<void>();
  try {
    await onSave();
    _saveProcess();
    notifyListeners();
    await onDidSave();
    _saveCompleter?.complete();
    _saveCompleter = null;
  } catch (e) {
    _saveCompleter?.completeError(e);
    _saveCompleter = null;
  } finally {
    _saveCompleter?.complete();
    _saveCompleter = null;
  }
}