public ActionResult ApplyVoucher(string voucher_code)
        {
            var apply_coupon_to_basket_command = new ApplyCouponToBasketCommand(get_basket_id(), voucher_code);

            handle_domain_exception(() =>
                                        {
                                            _application.action_request_to(apply_coupon_to_basket_command);
                                        });

            return Redirect("Index");
        }