code: private void paintAjax(final WRadioButtonSelect rbSelect, final XmlStringBuilder xml) {
  		// Start tag
  		xml.appendTagOpen("ui:ajaxtrigger");
  		xml.appendAttribute("triggerId", rbSelect.getId());
  		xml.appendClose();
  
  		// Target
  		xml.appendTagOpen("ui:ajaxtargetid");
  		xml.appendAttribute("targetId", rbSelect.getAjaxTarget().getId());
  		xml.appendEnd();
  
  		// End tag
  		xml.appendEndTag("ui:ajaxtrigger");
  	}
docs: Paints the AJAX information for the given WRadioButtonSelect.
  
  @param rbSelect the WRadioButtonSelect to paint.
  @param xml the XmlStringBuilder to paint to.