/**
  * Return the Survey Completed event
  *
  * @return \Gems_Event_SurveyCompletedEventInterface event instance or null
  */
 public function getSurveyCompletedEvent()
 {
     if ($this->_gemsSurvey['gsu_completed_event']) {
         return $event = $this->events->loadSurveyCompletionEvent($this->_gemsSurvey['gsu_completed_event']);
     }
 }