/**
* {@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;
}
