.TILMedia.BaseClasses.PartialVLEFluidObjectFunctions.steamMassFraction_psxi .TILMedia.BaseClasses.PartialVLEFluidObjectFunctions.steamMassFraction_psxipartial function steamMassFraction_psxi = TILMedia.BaseClasses.PartialVLEFluidObjectFunctionPrototypes.steamMassFraction_psxi;