class FilterPluginManager

class FilterPluginManager extends DefaultPluginManager implements FallbackPluginManagerInterface {

  /**
   * Constructs a FilterPluginManager object.
   *
   * @param \Traversable $namespaces
   *   An object that implements \Traversable which contains the root paths
   *   keyed by the corresponding namespace to look for plugin implementations.
   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
   *   Cache backend instance to use.
   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
   *   The module handler to invoke the alter hook with.
   */
  public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
    parent::__construct('Plugin/Filter', $namespaces, $module_handler, 'Drupal\\filter\\Plugin\\FilterInterface', Filter::class, 'Drupal\\filter\\Annotation\\Filter');
    $this
      ->alterInfo('filter_info');
    $this
      ->setCacheBackend($cache_backend, 'filter_plugins');
  }

  /**
   * {@inheritdoc}
   */
  public function getFallbackPluginId($plugin_id, array $configuration = []) {
    return 'filter_null';
  }

}