863: Precondition ‘isParametric’ on IRD rules is bogus
The precondition ‘isParametric’ is attached to the majority of the IRD rules. The precondition is satisfied (true) where InterestRateStream/cashflows is absent (“does not exist”), or cashflows/cashflowsMatchParameters is true; in other words (informally) in all cases where not(cashflowsMatchParameters is false). The purpose of cashflowsMatchParameters is to declare whether (or not) the content of cashflows (multiple paymentCalculationPeriods, … Continued