CashRegister implements Serializable { public CashRegister (int id, String label, String locationId, int nextTicketId) { this.id = id; this.machineName = label; this.locationId = locationId; this.nextTicketId = nextTicketId; } CashRegister(int id, String label, String locationId,
            int nextTicketId); int getId(); String getMachineName(); String getLocationId(); int getNextTicketId(); static CashRegister fromJSON(JSONObject o);  }
@Test public void cashRegisterTest() { assertNotNull(new CashRegister(1, "", "", 1)); }