function findNotYetConfirmed($user_id = null)
 {
     $objects = array();
     $data_dir = $this->getGlobPath($user_id);
     foreach (glob($data_dir) as $file_path) {
         $file_path_confirmed = MovieViewerReviewPackPaymentConfirmationRepositoryInFile::getFilePathFromRequestPath($file_path);
         if (file_exists($file_path_confirmed)) {
             continue;
         }
         $object = $this->createObject($file_path);
         $objects[] = $object;
     }
     return $objects;
 }