@Override
  public void actionPerformed(@NotNull AnActionEvent e) {
    var file = myRefCardPath.getValue();
    if (file != null) {
      BrowserUtil.browse(file);
    }
    else {
      var url = ExternalProductResourceUrls.getInstance().getKeyboardShortcutsPdfUrl();
      if (url != null) {
        BrowserUtil.browse(url.toExternalForm());
      }
    }
  }
@Override
  public void actionPerformed(@NotNull AnActionEvent e)