public void setSeatsInRow(int rowNumber, int numOfSeatsInRow){
        if (numOfSeatsInRow <= MAX_SEATS_PER_ROW) {
            ArrayList<Seat> tmpList = new ArrayList<>();
            for (int i = 0; i < numOfSeatsInRow; i++) {
                Seat tmp = new Seat(rowNumber + ":" + i);
                tmpList.add(tmp);
            }
            seats.add(tmpList);
        }else {
            setSeatsInRow(rowNumber, MAX_SEATS_PER_ROW);
        }
    }