forward addExtension call to inner factory

Author: dbu

QuietFactory.php

@@ -11,7 +11,9 @@
 
 namespace Symfony\Cmf\Bundle\MenuBundle;
 
+use Knp\Menu\Factory\ExtensionInterface;
 use Knp\Menu\FactoryInterface;
+use LogicException;
 use Psr\Log\LoggerInterface;
 use Symfony\Component\Routing\Exception\RouteNotFoundException;
 
@@ -69,10 +71,28 @@ public function createItem($name, array $options = array())
             }
 
             // remove route and content options
-            unset($options['route']);
-            unset($options['content']);
+            unset($options['route'], $options['content']);
 
             return $this->innerFactory->createItem($name, $options);
         }
     }
+
+    /**
+     * Forward adding extensions to the wrapped factory.
+     *
+     * @param ExtensionInterface $extension
+     * @param int                $priority
+     *
+     * @throws \Exception if the inner factory does not implement the addExtension method.
+     */
+    public function addExtension(ExtensionInterface $extension, $priority = 0)
+    {
+        if (!method_exists($this->innerFactory, 'addExtension')) {
+            throw new LogicException(sprintf(
+                'Wrapped factory "%s" does not have the method "addExtension".',
+                get_class($this->innerFactory)
+            ));
+        }
+        $this->innerFactory->addExtension($extension, $priority);
+    }
 }