operator [] method

@override Future<Object?> operator [](String key)

Return value which paired with key.

If the given key is not assigned with any values, it returns null.

Implementation

@override
Future<Object?> operator [](String key) async {
  try {
    return await entries
        .singleWhere((element) => element.key == key)
        .then((value) => value.value);
  } on StateError {
    return null;
  }
}