function repoSearchHandler($command)
 {
     global $ilTabs;
     $ilTabs->activateTab("grades");
     include_once './Services/Search/classes/class.ilRepositorySearchGUI.php';
     $rep_search = new ilRepositorySearchGUI();
     $rep_search->setTitle($this->lng->txt("rep_robj_xeph_add_participant"));
     $rep_search->setCallback($this, 'addParticipant');
     $rep_search->executeCommand($command);
     // Set tabs
     $this->tabs_gui->setTabActive('members');
     $this->ctrl->setReturn($this, 'showSubmissions');
 }