code: public function applies(RouteMatchInterface $route_match) {
      // This breadcrumb apply only for all articles.
      $parameters = $route_match->getParameters()->all();
      if (isset($parameters['node']) && is_object($parameters['node'])) {
        return $parameters['node']->getType() == 'article';
      }
      return FALSE;
    }
docs: {@inheritdoc}