public CartModel Assign(CartModel cart, Guid userGuid)
{
cart.AnyStandardPaymentMethodsAvailable = _paymentMethodService.AnyStandardMethodsEnabled();
cart.PayPalExpressAvailable = _paymentMethodService.PayPalExpressCheckoutIsEnabled();
cart.PayPalExpressPayerId = GetPayPalExpressPayerId(userGuid);
cart.PayPalExpressToken = GetPayPalExpressToken(userGuid);
cart.BillingAddress = GetBillingAddress(cart, userGuid);
List <BasePaymentMethod> availablePaymentMethods = _paymentMethodService.GetAllAvailableMethods(cart);
cart.AvailablePaymentMethods = availablePaymentMethods;
cart.PaymentMethod = GetPaymentMethodInfo(userGuid, availablePaymentMethods, cart);
return(cart);
}