.TILMedia.BaseClasses.PartialVLEFluidFunctions.steamMassFraction_psxi .TILMedia.BaseClasses.PartialVLEFluidFunctions.steamMassFraction_psxipartial function steamMassFraction_psxi = TILMedia.BaseClasses.PartialVLEFluidFunctionPrototypes.steamMassFraction_psxi;