public ExtraCheeseTopping(BasePizza pizzaToDecorate)
     : base(pizzaToDecorate)
 {
     price = 0.99;
 }
 public JalapenoTopping(BasePizza pizzaToDecorate)
     : base(pizzaToDecorate)
 {
     price = 1.49;
 }
 public MushroomTopping(BasePizza pizzaToDecorate)
     : base(pizzaToDecorate)
 {
     price = 1.49;
 }