Support for rename().
$from_uri,: The URI to the file to rename.
$to_uri: The new URI for file.
TRUE if file was successfully renamed.
Overrides StreamWrapperInterface::rename
http://php.net/manual/streamwrapper.rename.php
public function rename($from_uri, $to_uri) {
return rename($this
->getLocalPath($from_uri), $this
->getLocalPath($to_uri));
}