public function cacher($path = '')
    {
        if (!$path) {
            $path = sys_get_temp_dir() . DIRECTORY_SEPARATOR;
        }
        $cache = new AssetCacher($path, $this->config->theme());
        $cache->configTimestamp($this->config->modifiedTime());
        $cache->filterRegistry($this->filterRegistry());
        return $cache;
    }