/**
  * Constructs a YamlDiscoveryDecorator object.
  *
  * @param \Drupal\Component\Plugin\Discovery\DiscoveryInterface $decorated
  *   The discovery object that is being decorated.
  * @param string $name
  *   The file name suffix to use for discovery; for instance, 'test' will
  *   become 'MODULE.test.yml'.
  * @param array $directories
  *   An array of directories to scan.
  */
 public function __construct(DiscoveryInterface $decorated, $name, array $directories)
 {
     parent::__construct($name, $directories);
     $this->decorated = $decorated;
 }