code: public Form getSearchForm(XMPPConnection con, DomainBareJid searchService) throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
          UserSearch search = new UserSearch();
          search.setType(IQ.Type.get);
          search.setTo(searchService);
  
          IQ response = con.createStanzaCollectorAndSend(search).nextResultOrThrow();
          return Form.getFormFrom(response);
      }
docs: Returns the form for all search fields supported by the search service.
  
  @param con           the current XMPPConnection.
  @param searchService the search service to use. (ex. search.jivesoftware.com)
  @return the search form received by the server.
  @throws XMPPErrorException
  @throws NoResponseException
  @throws NotConnectedException
  @throws InterruptedException