public function getTopChildren()
    {
        if (is_null($this->topMenuItems)) {
            /* @var $request Request */
            $request = $this->container->get('request_stack')->getCurrentRequest();
            $this->topMenuItems = array();
            foreach ($this->getAdaptors() as $menuAdaptor) {
                $menuAdaptor->adaptChildren($this, $this->topMenuItems, null, $request);
            }
        }

        return $this->topMenuItems;
    }