.TILMedia.BaseClasses.PartialVLEFluidObjectFunctions.vapourMassFraction_psxin .TILMedia.BaseClasses.PartialVLEFluidObjectFunctions.vapourMassFraction_psxinpartial function vapourMassFraction_psxin = TILMedia.BaseClasses.PartialVLEFluidObjectFunctionPrototypes.vapourMassFraction_psxin;