/**
  * get Gallery list
  *
  * @param Response $response
  */
 private function getGalleryList(Response $response)
 {
     $list = $this->manager->getGalleryList();
     foreach ($list as $gallery) {
         /** @var \FDevs\Photatoes\Gallery $gallery */
         $file = $this->prepareGallery($gallery);
         $response->addFile($file);
         $response->addTreeFile($file);
     }
 }