/**
  * Finds the Empparticipation model based on its primary key value.
  * If the model is not found, a 404 HTTP exception will be thrown.
  * @param integer $event_no
  * @param integer $employee_no
  * @return Empparticipation the loaded model
  * @throws NotFoundHttpException if the model cannot be found
  */
 protected function findModel($event_no, $employee_no)
 {
     if (($model = Empparticipation::findOne(['event_no' => $event_no, 'employee_no' => $employee_no])) !== null) {
         return $model;
     } else {
         throw new NotFoundHttpException('The requested page does not exist.');
     }
 }