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