protected function addCommandButtons()
 {
     if ($this->object->getId() > 0) {
         $this->addCommandButton(ilUserSettingsGUI::CMD_UPDATE, $this->pl->txt('form_button_update'));
     } else {
         $this->addCommandButton(ilUserSettingsGUI::CMD_CREATE, $this->pl->txt('form_button_create'));
     }
     $this->addCommandButton(ilUserSettingsGUI::CMD_CANCEL, $this->pl->txt('form_button_cancel'));
 }