/**
  * @param string $strListIdentifier
  *
  * @return string
  */
 protected function renderLevelUpAction($strListIdentifier)
 {
     if ($strListIdentifier == class_module_mediamanager_admin::INT_LISTTYPE_FOLDER) {
         $objCur = class_objectfactory::getInstance()->getObject($this->getSystemid());
         if ($objCur instanceof class_module_mediamanager_file) {
             return $this->objToolkit->listButton(class_link::getLinkAdmin($this->getArrModule("modul"), "openFolder", "&systemid=" . $objCur->getPrevId(), "..", $this->getLang("commons_one_level_up"), "icon_folderActionLevelup"));
         } else {
             if ($objCur instanceof class_module_mediamanager_repo) {
                 return $this->objToolkit->listButton(class_link::getLinkAdmin($this->getArrModule("modul"), "list", "", "..", $this->getLang("commons_one_level_up"), "icon_folderActionLevelup"));
             }
         }
     }
     if ($strListIdentifier == self::INT_LISTTYPE_FOLDERVIEW) {
         $objCur = class_objectfactory::getInstance()->getObject($this->getSystemid());
         $strTargetId = $objCur->getPrevId();
         if ($strTargetId == $this->getObjModule()->getSystemid()) {
             $strTargetId = "";
         }
         return $this->objToolkit->listButton(class_link::getLinkAdmin($this->getArrModule("modul"), "folderContentFolderviewMode", "&form_element=" . $this->getParam("form_element") . "&systemid=" . $strTargetId, "", $this->getLang("commons_one_level_up"), "icon_folderActionLevelup"));
     }
     return parent::renderLevelUpAction($strListIdentifier);
 }