Add KnpLab menu type hinting on AdminExtensionInterface

Admin/AdminExtensionInterface.php

@@ -18,7 +18,7 @@ use Sonata\AdminBundle\Route\RouteCollection;
 use Sonata\AdminBundle\Validator\ErrorElement;
 use Sonata\AdminBundle\Admin\AdminInterface;
 
-use Knp\Menu\MenuItem;
+use Knp\Menu\ItemInterface as MenuItemInterface;
 
 interface AdminExtensionInterface
 {
@@ -66,7 +66,7 @@ interface AdminExtensionInterface
      * @param null|Admin $childAdmin
      * @return void
      */
-    function configureSideMenu(Admin $admin, MenuItem $menu, $action, Admin $childAdmin = null);
+    function configureSideMenu(Admin $admin, MenuItemInterface $menu, $action, Admin $childAdmin = null);
 
     /**
      * @abstract