.TILMedia.Internals.GasConfigurations.AnalyticDerivatives.GasObjectFunctions.humidityRatio_xi .TILMedia.Internals.GasConfigurations.AnalyticDerivatives.GasObjectFunctions.humidityRatio_xifunction humidityRatio_xi = TILMedia.Internals.GasObjectFunctions.humidityRatio_xi;