private void showNotification(@NlsContexts.PopupContent String title) {
    SwingUtilities.invokeLater(() -> {
      final Balloon b =
        JBPopupFactory.getInstance().createHtmlTextBalloonBuilder(title, null, MessageType.INFO.getPopupBackground(), null)
          .setFadeoutTime(3000)
          .setShowCallout(false)
          .createBalloon();

      Dimension size = myDiffView.getSize();
      RelativePoint point = new RelativePoint(myDiffView, new Point(size.width / 2, size.height / 2));
      b.show(point, Balloon.Position.above);
    });
  }
private void showNotification(@NlsContexts.PopupContent String title)