public static function createDeleteObjectsXmlBody($objects, $quiet)
    {
        $xml = new \SimpleXMLElement('<?xml version="1.0" encoding="utf-8"?><Delete></Delete>');
        $xml->addChild('Quiet', $quiet);
        foreach ($objects as $object) {
            $sub_object = $xml->addChild('Object');
            $object = OssUtil::sReplace($object);
            $sub_object->addChild('Key', $object);
        }
        return $xml->asXML();
    }