Function converted_cashflow_records 

pub(crate) fn converted_cashflow_records<R: Scalar>(
    legs: &[&Leg],
    disc: &dyn YieldCurve<R>,
    curves: &dyn CurveByIndex<R>,
    fixings: &FixingsView<'_, R>,
    as_of: NaiveDate,
    conversions: &[Option<Conversion>],
) -> Result<Records, CashflowError>