public void UpdateWaiterTest()
        {
            // TODO: add unit test for the method 'UpdateWaiter'
            int?         restaurantId = null; // TODO: replace null with proper value
            int?         waiterId     = null; // TODO: replace null with proper value
            WaiterUpdate contract     = null; // TODO: replace null with proper value

            instance.UpdateWaiter(restaurantId, waiterId, contract);
        }
 public void Init()
 {
     instance = new WaiterUpdate();
 }