Neos\Flow\ResourceManagement\Streams\StreamWrapperInterface::closeDirectory PHP Method

    public function closeDirectory();

 /**
  * Close directory handle.
  *
  * This method is called in response to closedir().
  *
  * Any resources which were locked, or allocated, during opening and use of
  * the directory stream should be released.
  *
  * @return boolean TRUE on success or FALSE on failure.
  */
 public function dir_closedir()
 {
     return $this->streamWrapper->closeDirectory();
 }