/**
  * @param int $a_ref_id
  * @param int $a_id_type
  * @param int $a_parent_node_id
  */
 public function __construct($a_ref_id = 0, $a_id_type = self::REPOSITORY_NODE_ID, $a_parent_node_id = 0)
 {
     global $ilCtrl, $ilAccess, $lng, $ilUser, $ilTabs, $tpl;
     parent::__construct($a_ref_id, $a_id_type, $a_parent_node_id);
     $this->ctrl = $ilCtrl;
     $this->access = $ilAccess;
     $this->lng = $lng;
     $this->user = $ilUser;
     $this->tabs = $ilTabs;
     $this->tpl = $tpl;
     $this->pl = new ilEdupadPlugin();
 }