docs: public String getScreenCommand()
      {
          String command = UrlUtil.addURLParam(null, Params.APPLET, (this.getBaseApplet() != null) ? this.getBaseApplet().getProperty(Params.APPLET) : null, true);
          command = UrlUtil.addURLParam(command, Params.SCREEN, this.getClass().getName());
          return command;
      }