fn parse_request(mut parts: std::str::SplitWhitespace<'_>) -> RequestParserResult<'_> {

        let uri = parts.next().map(|s| s.to_string());

        debug_assert!(parts.next().is_none());

        Ok((Request::Update(uri), ""))

    }

    fn parse_response(

        parts: ResponseAttributes<'_>,

    ) -> Result<Self::Response, ResponseParserError> {

        let parts: HashMap<_, _> = parts.into();

        let updating_db = get_and_parse_property!(parts, "updating_db", Text);

        Ok(UpdateResponse { updating_db })

    }