/**
  * Update the PoiTypes in the database with the given List of PoiTypes.
  *
  * @param newPoiTypes The PoiTypes to update.
  */
 public void updatePoiTypes(List<PoiType> newPoiTypes) {
   for (PoiType newPoiType : newPoiTypes) {
     PoiType byBackendId = poiTypeDao.findByBackendId(newPoiType.getBackendId());
     if (byBackendId != null) {
       newPoiType.setId(byBackendId.getId());
     }
     savePoiType(newPoiType);
   }
 }