static async Task <Toast[]> MakeToastWithButterAndJamAsync(int number)
        {
            var toasts = await Breakfast.ToastBreadAsync(number);

            foreach (var toast in toasts)
            {
                Breakfast.ApplyButter(toast);
            }

            foreach (var toast in toasts)
            {
                Breakfast.ApplyJam(toast);
            }

            return(toasts);
        }