public static void Start()
        {
            var menu    = new Menu("Main", "All menu");
            var cafe    = new CafeMenu();
            var diner   = new DinerMenu();
            var pancake = new PancakeHouseMenu();
            var desert  = new DesertMenu();

            menu.Add(cafe);
            menu.Add(diner);
            menu.Add(pancake);
            cafe.Add(desert);

            var waitress = new Waitress(menu);

            waitress.PrintMenu();
            "**********************".P();
            waitress.PrintVegetarianMenu();
        }