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