Update tests/src/Functional/JsonapiMenuItemsTest.php

src/Resource/MenuItemsResource.php

@@ -24,6 +24,7 @@ use Drupal\system\MenuInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Route;
+use Drupal\Core\Entity\EntityFieldManagerInterface;
 
 /**
  * Processes a request for a collection of featured nodes.
@@ -38,6 +39,23 @@ final class MenuItemsResource extends ResourceBase implements ContainerInjection
    * @var array
    */
   protected $menuItems = [];
+  // ...
+    
+    protected $entityFieldManager;
+    
+    public function filterFields(array $fields): array
+    {
+        $filteredFields = [];
+        $definitions = $this->entityFieldManager->getFieldDefinitions('menu_link_content', 'menu_link_content');
+        
+        foreach ($fields as $field) {
+            if (isset($definitions[$field])) {
+                $filteredFields[] = $field;
+            }
+        }
+        
+        return $filteredFields;
+    }
 
   /**
    * The menu tree.