.TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourMassFraction_psxin .TILMedia.BaseClasses.PartialVLEFluidFunctions.vapourMassFraction_psxinpartial function vapourMassFraction_psxin = TILMedia.BaseClasses.PartialVLEFluidFunctionPrototypes.vapourMassFraction_psxin;