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

    public function readDirectory();

 /**
  * Read entry from directory handle.
  *
  * This method is called in response to readdir().
  *
  * @return string Should return string representing the next filename, or FALSE if there is no next file.
  */
 public function dir_readdir()
 {
     return $this->streamWrapper->readDirectory();
 }