ApiGen\Templating\Filters\UrlFilters::resolveInternalAnnotation PHP Method

    private function resolveInternalAnnotation($text)
    {
        $pattern = '~\\{@(\\w+)(?:(?:\\s+((?>(?R)|[^{}]+)*)\\})|\\})~';
        return preg_replace_callback($pattern, function ($matches) {
            if ($matches[1] !== 'internal') {
                return $matches[0];
            }
            if ($this->configuration->getOption(CO::INTERNAL) && isset($matches[2])) {
                return $matches[2];
            }
            return '';
        }, $text);
    }