/**
  * Sets the $nodes access roles
  *
  * @param \SimpleXMLElement $nodeXml
  * @param NodeInterface $node
  * @return void
  */
 protected function importNodeAccessRoles(\SimpleXMLElement $nodeXml, NodeInterface $node)
 {
     if (!$nodeXml->accessRoles) {
         return;
     }
     $accessRoles = array();
     foreach ($nodeXml->accessRoles->children() as $accessRoleXml) {
         $accessRoles[] = (string) $accessRoleXml;
     }
     $node->setAccessRoles($accessRoles);
 }