docs: public static void showErrorDialog(String message, Throwable t, Runnable onClose) {
  
          Window window = prepareWindow(DialogWidth.wide);
          window.setCaption("Error");
          window.setContent(
              new CmsSetupErrorDialog(message, message + "\n\n" + ExceptionUtils.getStackTrace(t), onClose, window));
          A_CmsUI.get().addWindow(window);
      }