protected function getDocblockTagsSection($docblock)
    {
        $docblock = $this->sanitizeDocblock($docblock);
        preg_match('/^\s*\\'.self::TOKEN_ANNOTATION_IDENTIFIER.'/m', $docblock, $matches, PREG_OFFSET_CAPTURE);

        // return found docblock tag section or empty string
        return isset($matches[0]) ? substr($docblock, $matches[0][1]) : '';
    }