// TODO: implement toJson

    // no need to implement this

  int get currentPlayer => game.currentPlayer == TicTacToePlayer.O ? 0 : 1;

  int get currentPlayer => game.currentPlayer == TicTacToePlayer.X ? 0 : 1;

        reward[game.winner! == TicTacToePlayer.O ? 0 : 1] = 1.0;

        reward[game.winner! == TicTacToePlayer.X ? 0 : 1] = 1.0;