public ParkingService choose(List<ParkingService> lots) {
        ParkingService lot = null;
        int max = 0;
        for (ParkingService parkingLot : lots) {
            if (parkingLot.getFreeAreaSize() > max) {
                max = parkingLot.getFreeAreaSize();
                lot = parkingLot;
            }
        }
        return lot;
    }