public Order ChangeShipTimeAndDate(Order order, Date date, TimeOfDay time)
 {
     order.ShipTime = time;
     order.ShipDate = date;
     return order;
 }
 public bool CheckShipTime(Order order, TimeOfDay time)
 {
     return order.ShipTime == time;
 }
 public bool CheckShipDate(Order order, Date date)
 {
     return order.ShipDate == date;
 }
 public TimeOfDay GetShipTime(Order order)
 {
     return order.ShipTime;
 }
 public Date GetShipDate(Order order)
 {
     return order.ShipDate;
 }
 public Order PlaceOrder(Customer customer, Order order)
 {
     return order;
 }