.TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourMassFraction_phxin .TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourMassFraction_phxinpartial function vapourMassFraction_phxin = TILMedia.BaseClasses.PartialVLEFluidFunctionPrototypes.vapourMassFraction_phxin;