private void showInvalidRequestNotification() {
    ApplicationManager.getApplication().invokeLater(() -> {
      if (myDisposed) return;
      if (!myNotificationPanel.isNull()) return;

      EditorNotificationPanel notification = new EditorNotificationPanel(LightColors.RED, EditorNotificationPanel.Status.Error);
      notification.setText(DiffBundle.message("error.conflict.is.not.valid.and.no.longer.can.be.resolved"));
      notification.createActionLabel(DiffBundle.message("button.abort.resolve"), () -> {
        applyRequestResult(MergeResult.CANCEL);
        closeDialog();
      });
      myNotificationPanel.setContent(notification);
      myMainPanel.validate();
      myMainPanel.repaint();
    }, ModalityState.stateForComponent(myPanel));
  }
private void showInvalidRequestNotification()