QuantLib::Leg buildLeg(const ore::data::LegData &data, const QuantLib::ext::shared_ptr< ore::data::EngineFactory > &engineFactory, ore::data::RequiredFixings &requiredFixings, const std::string &configuration, const QuantLib::Date &openEndDateReplacement=QuantLib::Null< QuantLib::Date >(), const bool useXbsCurves=false) const override