/**
  * Creates the model
  *
  * @return \MUtil_Model_ModelAbstract
  */
 protected function createModel()
 {
     if (!$this->model instanceof \Gems_Tracker_Model_TrackModel) {
         $tracker = $this->loader->getTracker();
         $this->model = $tracker->getRespondentTrackModel();
         if (!$this->trackEngine instanceof \Gems_Tracker_Engine_TrackEngineInterface) {
             $this->trackEngine = $this->respondentTrack->getTrackEngine();
         }
         $this->model->applyEditSettings($this->trackEngine);
     }
     $this->model->set('restore_tokens', 'label', $this->_('Restore tokens'), 'description', $this->_('Restores tokens with the same code as the track.'), 'elementClass', 'Checkbox');
     return $this->model;
 }