Handle<BlackVolTermStructure> makeFlatVolatility(const Handle<Quote>& vol, DayCounter dc = SimpleDayCounter()) {
makeFlatVolatility(const Handle<Quote>& vol, DayCounter dc = SimpleDayCounter()) {
    Handle<BlackVolTermStructure> makeFlatVolatility(const Handle<Quote>& vol,                                                     DayCounter dc = SimpleDayCounter()) {        Date today = Date::todaysDate();        return Handle<BlackVolTermStructure>(new            BlackConstantVol(today, RelinkableHandle<Quote>(vol), dc));    }