/** * {@inheritdoc} */ public function filters($instance_id = NULL) { if (!isset($this->filterBag)) { $this->filterBag = new FilterBag(\Drupal::service('plugin.manager.filter'), $this->filters); $this->filterBag->sort(); } if (isset($instance_id)) { return $this->filterBag->get($instance_id); } return $this->filterBag; }