code: void mergeTo(final NominatimSearchRequest request) {
          if (null == request.getBounded() && null != bounded) {
              request.setBounded(bounded);
          }
          if (null == request.getViewBox()) {
              request.setViewBox(viewBox);
          }
          if (null == request.getPolygonFormat()) {
              request.setPolygonFormat(polygonFormat);
          }
          if (null == request.getAcceptLanguage() && null != acceptLanguage) {
              request.setAcceptLanguage(acceptLanguage.toString());
          }
      }
docs: Merge this default options to the given request.
  
  @param request
  the request where the result is merged