protected function afterSave(ilObject $a_new_object)
 {
     global $ilUser, $tree;
     // add default translation
     $a_new_object->addTranslation($a_new_object->getTitle(), $a_new_object->getDescription(), $ilUser->getPref("language"), true);
     // default: sort by title
     include_once 'Services/Container/classes/class.ilContainerSortingSettings.php';
     $settings = new ilContainerSortingSettings($a_new_object->getId());
     $settings->setSortMode(ilContainer::SORT_TITLE);
     $settings->save();
     // inherit parents content style, if not individual
     $parent_ref_id = $tree->getParentId($a_new_object->getRefId());
     $parent_id = ilObject::_lookupObjId($parent_ref_id);
     include_once "./Services/Style/classes/class.ilObjStyleSheet.php";
     $style_id = ilObjStyleSheet::lookupObjectStyle($parent_id);
     if ($style_id > 0) {
         if (ilObjStyleSheet::_lookupStandard($style_id)) {
             ilObjStyleSheet::writeStyleUsage($a_new_object->getId(), $style_id);
         }
     }
     // always send a message
     ilUtil::sendSuccess($this->lng->txt("cat_added"), true);
     $this->ctrl->setParameter($this, "ref_id", $a_new_object->getRefId());
     $this->redirectToRefId($a_new_object->getRefId(), "");
 }