.TILMedia.Internals.GasConfigurations.AnalyticDerivatives.GasObjectFunctions.densityDerivativeWRTspecificEnthalpy_phxi .TILMedia.Internals.GasConfigurations.AnalyticDerivatives.GasObjectFunctions.densityDerivativeWRTspecificEnthalpy_phxifunction densityDerivativeWRTspecificEnthalpy_phxi = TILMedia.Internals.GasObjectFunctions.densityDerivativeWRTspecificEnthalpy_phxi;