copy method

Implementation

@override
CopyCommandsContainer copy() => CopyCommandsContainer(
      container: List<SimpleContainer>.generate(
        super.container.length,
        (int i) => super.container[i].copy(),
      ),
      moves: List<SimpleContainer>.generate(
        super.moves.length,
        (int i) => super.moves[i].copy(),
      ),
      languageCode: super.languageCode,
      added1: added1,
      added2: added2,
    );