private static function getKalturaMrssXml($title, $link = null, $description = null)
 {
     $mrss = kMrssManager::getMrssXml($title, $link, $description);
     foreach ($mrss->children() as $second_gen) {
         if ($second_gen->getName() == 'channel') {
             $second_gen->addChild('items', self::ITEMS_PLACEHOLDER);
         }
     }
     return $mrss->asXML();
 }