public function renderOnShutdown($here = true, $initialize = true, $renderStackedData = true, $head = false)
    {
        register_shutdown_function(array($this, "replaceTagInBuffer"), $here, $initialize, $renderStackedData, $head);

        if (ob_get_level() === 0) {
            ob_start();
        }

        return ($here) ? self::REPLACEABLE_TAG : "";
    }