code: protected HttpBuilder respond(String text){
          if(text == null){
              text = "null";
          }
          DirectResponse resp = new DirectResponse(text);
          RequestContext.setControllerResponse(resp);
          return new HttpBuilder(resp);
      }
docs: This method will send the text to a client verbatim. It will not use any layouts. Use it to build app.services
  and to support AJAX.
  
  @param text text of response.
  @return {@link HttpSupport.HttpBuilder}, to accept additional information.