code: public String getScreenURL()
      {
          String strURL = super.getScreenURL();
          if (this.getClass().getName().equals(GridScreen.class.getName()))
              strURL = this.addURLParam(strURL, DBParams.RECORD, this.getMainRecord().getClass().getName());
          else
              strURL = this.addURLParam(strURL, DBParams.SCREEN, this.getClass().getName());
          return strURL;
      }
docs: Get the command string that will restore this screen.
  @return The URL for this screen.