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

        let uri = parts.next().ok_or(RequestParserError::UnexpectedEOF)?;

        let uri = uri

            .parse()

            .map_err(|_| RequestParserError::SyntaxError(1, uri.to_owned()))?;

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

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

    }

    fn parse_response(

        parts: ResponseAttributes<'_>,

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

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

        let comments = parts

            .iter()

            .map(|(k, v)| match v {

                GenericResponseValue::Text(s) => Ok((k.to_string(), s.to_string())),

                GenericResponseValue::Binary(_) => Err(ResponseParserError::SyntaxError(1, k)),

            })

            .collect::<Result<HashMap<_, _>, ResponseParserError>>()?;

        Ok(comments)

    }