@Override
 public PaginatedData<Guest> findByFilter(
     final int firstpage, final int numberOfPages, final String name, final OrderMode orderMode) {
   final GuestFilter guestFilter = new GuestFilter();
   final PaginationData page = new PaginationData(firstpage, numberOfPages, "name", orderMode);
   guestFilter.setName(name);
   guestFilter.setPaginationData(page);
   return guestRepository.findByFilter(guestFilter);
 }