.TILMedia.BaseClasses.PartialGasObjectFunctions.densityDerivativeWRTmassFraction_psxin .TILMedia.BaseClasses.PartialGasObjectFunctions.densityDerivativeWRTmassFraction_psxinpartial function densityDerivativeWRTmassFraction_psxin = TILMedia.BaseClasses.PartialGasObjectFunctionPrototypes.densityDerivativeWRTmassFraction_psxin;