private void SetDefaultValues()
 {
     _type      = CoffeeType.Espresso;
     _size      = CoffeeSize.Small;
     _sweetness = CoffeeSweetness.OneSpoon;
     _addons.Clear();
 }
 public void PutTwoSpoonsOfSugar()
 {
     _sweetness = CoffeeSweetness.TwoSpoons;
 }
 public void PutOneSpoonOfSugar()
 {
     _sweetness = CoffeeSweetness.OneSpoon;
 }
 public void PutNoSugar()
 {
     _sweetness = CoffeeSweetness.NoSugar;
 }