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

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

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

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

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

        Ok((

            Request::OutputSet(

                output_id.to_string(),

                attribute_name.to_string(),

                attribute_value.to_string(),

            ),

            "",

        ))

    }

    fn parse_response(

        parts: ResponseAttributes<'_>,

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

        debug_assert!(parts.is_empty());

        Ok(())

    }