.TILMedia.BaseClasses.PartialGasFunctions.densityDerivativeWRTmassFraction_psxin .TILMedia.BaseClasses.PartialGasFunctions.densityDerivativeWRTmassFraction_psxinpartial function densityDerivativeWRTmassFraction_psxin = TILMedia.BaseClasses.PartialGasFunctionPrototypes.densityDerivativeWRTmassFraction_psxin;