add paymentType to puchase-event

extend Basket-Model to add method to get payment-desc

Modules/Application/Model/Basket.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace D3\GoogleAnalytics4\Modules\Application\Model;
+
+use OxidEsales\Eshop\Application\Model\Payment;
+
+class Basket extends Basket_parent
+{
+    /**
+     * @return void
+     */
+    public function getPaymentOnPaymentId() :string
+    {
+        if ($this->getPaymentId()){
+            $oPayment = oxNew(Payment::class);
+            if ($oPayment->load($this->getPaymentId())){
+                return $oPayment->getFieldData('oxdesc');
+            }
+        }
+
+        return "couldn't load payment!";
+    }
+}