public function current()
    {
        list($name, $content) = $this->members[$this->pointer];
        if (is_a($content, ViewHelperInterface::class)) {
            /** @var $content ViewHelperInterface */
            return $content->__toString();
        }
        switch ($name) {
            case 'charset':
                return "<meta {$name}=\"{$content}\">";
            case 'base':
                return "<base href=\"{$content}\" />";
            default:
                return "<meta name=\"{$name}\" content=\"{$content}\">";
        }
    }