/**
  * Helper method which triggers the rendering of everything between the
  * opening and the closing tag.
  *
  * @return mixed The finally rendered child nodes.
  * @author Sebastian Kurfürst <*****@*****.**>
  * @author Bastian Waidelich <*****@*****.**>
  * @api
  */
 protected function renderChildren()
 {
     return $this->viewHelperNode->evaluateChildNodes();
 }