/// <summary>
/// Return a Cashflows object containing array of the payment calculation periods and array of principal exchanges.
/// </summary>
/// <param name="paymentCalendar"> </param>
/// <param name="interestRateStream">The interest rate stream.</param>
/// <param name="rollDates">The list of roll dates.</param>
/// <returns></returns>
public static Cashflows GetCashflows(List <DateTime> rollDates, IBusinessCalendar paymentCalendar, InterestRateStream interestRateStream)
{
CalculationPeriodsPrincipalExchangesAndStubs calculationPeriodsPrincipalExchangesAndStubs =
StreamCashflowsGenerator.GenerateCalculationPeriodsPrincipalExchangesAndStubsFromRollDates(interestRateStream, rollDates, paymentCalendar);
return(GetCashfows(interestRateStream, calculationPeriodsPrincipalExchangesAndStubs, paymentCalendar));
}