public static function getIdentifier(string $name) : string
    {
        static $salt;

        $salt   = $salt ?? $salt = self::loadBaseHashSalt();
        $suffix = substr(sha1($name . $salt), 0, 5);

        if (! preg_match(self::VALID_IDENTIFIER_FORMAT, $name)) {
            return self::DEFAULT_IDENTIFIER . $suffix;
        }

        return $name . $suffix;
    }