public ITetromino GetNextTetromino(ITetrominoRepository tetrominoRepository, ITetrominoFactory tetrominoFactory)
 {
     if (tetrominoRepository.Tetrominoes.Count < 1)
     {
         this.RefillTetrominoes(tetrominoRepository, tetrominoFactory);
     }
     return(tetrominoRepository.GetFirstElement());
 }