public ActionResult Configure()
        {
            var model = new ConfigurationModel();
            model.MerchantId = _PayuPaymentSettings.MerchantId;
            model.Key = _PayuPaymentSettings.Key;
            model.MerchantParam = _PayuPaymentSettings.MerchantParam;
            model.PayUri = _PayuPaymentSettings.PayUri;
            model.AdditionalFee = _PayuPaymentSettings.AdditionalFee;
            
           // return View("Nop.Plugin.Payments.Payu.Views.PaymentPayu.Configure", model);
            
           return View("~/Plugins/Payments.Payu/Views/PaymentPayu/Configure.cshtml", model);

           //return View("~/Plugins/Payments.PayPalStandard/Views/PaymentPayPalStandard/Configure.cshtml", model);
        }
        public ActionResult Configure(ConfigurationModel model)
        {
            if (!ModelState.IsValid)
                return Configure();

            //save settings
            _PayuPaymentSettings.MerchantId = model.MerchantId;
            _PayuPaymentSettings.Key = model.Key;
            _PayuPaymentSettings.MerchantParam = model.MerchantParam;
            _PayuPaymentSettings.PayUri = model.PayUri;
            _PayuPaymentSettings.AdditionalFee = model.AdditionalFee;
            _settingService.SaveSetting(_PayuPaymentSettings);
            
            //return View("Nop.Plugin.Payments.Payu.Views.PaymentPayu.Configure", model);
            //return View("~/Plugins/Payments.Payu/Views/PaymentPayu/Configure.cshtml", model);

            SuccessNotification(_localizationService.GetResource("Admin.Plugins.Saved"));

            return Configure();
        }