public function closeModal(array $form, FormStateInterface $form_state) {
    $response = new AjaxResponse();
    $dashboard_url = $this->getUrlGenerator()
      ->generateFromRoute(OpenyUpgradeLogManager::DASHBOARD);
    $response->addCommand(new RedirectCommand($dashboard_url));
    $response->addCommand(new CloseModalDialogCommand());
    return $response;
  }