/**
  * Wraps a sfFilebasePluginDirectory around the return
  * value of sfFilebasePluginFile::rename() to handle
  * the proper instance.
  *
  * @param mixed sfFilebasePluginFile | string $path_name
  * @return sfFilebasePluginDirectory $dir
  */
 public function rename($path_name, $overwrite = false)
 {
     return new sfFilebasePluginDirectory(parent::rename($path_name, $overwrite), $this->getFilebase());
 }