public function getForImportedEvent(ImportedEventModel $importedEventModel)
 {
     global $DB;
     $stat = $DB->prepare("SELECT event_recur_set.* FROM event_recur_set " . " JOIN event_information ON event_information.event_recur_set_id = event_recur_set.id " . " JOIN imported_event_is_event ON imported_event_is_event.event_id = event_information.id " . " WHERE imported_event_is_event.imported_event_id = :id");
     $stat->execute(array('id' => $importedEventModel->getId()));
     if ($stat->rowCount() > 0) {
         $ers = new EventRecurSetModel();
         $ers->setFromDataBaseRow($stat->fetch());
         return $ers;
     }
 }