Function export_rew_mdat_using 

pub fn export_rew_mdat_using(
    run: Option<&ExportRun<'_>>,
    scope: MdatScope,
    originals: &[Original],
    folder: &Path,
    mimo: Option<&MimoResponses>,
    sources: Option<&Sources>,
    spl_offset_db: Option<f64>,
    now_ms: i64,
    uuid: &mut dyn FnMut() -> Result<u128, ExportError>,
) -> Result<PathBuf, ExportError>

Writes the selected measurements and correction results to one REW mdat.