docs: public static void renderUnhandledFacesMessages(FacesContext facesContext)
              throws IOException
      {
          // create and configure HtmlMessages component
          HtmlMessages messages = (HtmlMessages) facesContext.getApplication()
                  .createComponent(HtmlMessages.COMPONENT_TYPE);
          messages.setId("javax_faces_developmentstage_messages");
          messages.setTitle("Project Stage[Development]: Unhandled Messages");
          messages.setStyle("color:orange");
          messages.setRedisplay(false);
          // render the component
          messages.encodeAll(facesContext);
      }