public function undeploy(ContainerConfigurationInterface $containerNode, $uuid)
    {

        // try to load the app node with the passe UUID
        if ($appNode = $this->load($uuid)) {
            // prepare file name
            $extractor = $this->getExtractor();
            $fileName = $appNode->getName() . $extractor->getExtensionSuffix();

            // load the file info
            $archive = new \SplFileInfo($this->getDeployDir($containerNode) . DIRECTORY_SEPARATOR . $fileName);

            // un-flag the archiv => un-deploy it with the next restart
            $extractor->unflagArchive($archive);
        }
    }