/**
  * Sync parent container
  * @param type $a_content_id
  * @param type $course
  */
 protected function syncParentContainer($a_content_id, $course)
 {
     if (!is_array($course->allocations)) {
         $GLOBALS['ilLog']->write(__METHOD__ . ': No allocation in course defined.');
         return 0;
     }
     if (!$course->allocations[0]->parentID) {
         $GLOBALS['ilLog']->write(__METHOD__ . ': No allocation parent in course defined.');
         return 0;
     }
     $parent_id = $course->allocations[0]->parentID;
     include_once './Services/WebServices/ECS/classes/Tree/class.ilECSCmsData.php';
     $parent_tid = ilECSCmsData::lookupFirstTreeOfNode($this->getServer()->getServerId(), $this->getMid(), $parent_id);
     return $this->syncNodetoTop($parent_tid, $parent_id);
 }