@RENDERER(kit="XUL_RENDERKIT",family="xul.component.family",type="xul.renderer.Message")
public class MessageRenderer extends XULRenderer {
public void encodeEnd(FacesContext facesContext, UIComponent component) throws IOException {
ResponseWriter responseWriter = facesContext.getResponseWriter();
MessageComponent messageComponent = (MessageComponent) component;
String forId = messageComponent.getFor();
if(forId == null){
throw new NullPointerException("For is null for MessageComponent !");
}