clear method

@override Future<bool> clear()

Implementation

@override
Future<bool> clear() async {
  await init();
  List<String> getItems() =>
      _prefs
          ?.getKeys()
          .where((element) => element.startsWith(_prefix))
          .toList() ??
      [];

  for (final _item in getItems()) {
    _prefs?.remove(_item);
  }
  return getItems().isEmpty;
}