public MeatDecorator(IHamburger hamburger) : base(hamburger) { }
public CheeseDecorator(IHamburger hamburger) : base(hamburger) { }
public BeconDecorator(IHamburger hamburger) : base(hamburger) { }
public HamburgerDecorator(IHamburger hamburger) { _hamburger = hamburger; }