Issue #3450595: Fix compatibility issue

Closes #3450595

src/Plugin/SingleContentSyncBaseFieldsProcessor/CommerceProduct.php

@@ -111,8 +111,8 @@ class CommerceProduct extends SingleContentSyncBaseFieldsProcessorPluginBase imp
   /**
    * {@inheritdoc}
    */
-  public function mapBaseFieldsValues(array $values): array {
-    $entity = [
+  public function mapBaseFieldsValues(array $values, FieldableEntityInterface $entity): array {
+    $base_fields = [
       'title' => $values['title'],
       'type' => $values['type'],
       'status' => $values['status'],
@@ -123,14 +123,14 @@ class CommerceProduct extends SingleContentSyncBaseFieldsProcessorPluginBase imp
     // Import user entity.
     if (!empty($values['uid'])) {
       $user = $this->importer->doImport($values['uid']);
-      $entity['uid'] = $user->id();
+      $base_fields['uid'] = $user->id();
     }
 
     // Import variations entity.
     if (!empty($values['variations'])) {
       foreach ($values['variations'] as $vid) {
         $commerce_product_variation = $this->importer->doImport($vid);
-        $entity['variations'][] = $commerce_product_variation->id();
+        $base_fields['variations'][] = $commerce_product_variation->id();
       }
     }
 
@@ -138,11 +138,11 @@ class CommerceProduct extends SingleContentSyncBaseFieldsProcessorPluginBase imp
     if (!empty($values['stores'])) {
       foreach ($values['stores'] as $sid) {
         $store = $this->importer->doImport($sid);
-        $entity['stores'][] = $store->id();
+        $base_fields['stores'][] = $store->id();
       }
     }
 
-    return $entity;
+    return $base_fields;
   }
 
 }