static void Main(string[] args)
        {
            Console.WriteLine("<Decorating an Expresso>");
            Beverage expresso = new Expresso();

            Console.WriteLine($"What: {expresso.getDescription(),-40} How Much: ${expresso.cost():F2}");
            expresso = new Cocoa(expresso);
            Console.WriteLine($"What: {expresso.getDescription(),-40} How Much: ${expresso.cost():F2}");
            expresso = new Milk(expresso);
            Console.WriteLine($"What: {expresso.getDescription(),-40} How Much: ${expresso.cost():F2}");
            Console.WriteLine("<Tasty!>");
        }