protected function getNodes(ReadBlockInterface $block)
    {
        $nodes = null;
        $nodeName = $block->getAttribute('nodeName');
        $siteId = $this->currentSiteManager->getSiteId();

        if (!is_null($nodeName)) {
            $nodes = $this->nodeRepository->getSubMenu($nodeName, $block->getAttribute('nbLevel'), $this->request->getLocale(), $siteId);
            $nodes = $this->getGrantedNodes($nodes);
        }

        return $nodes;
    }