.TILMedia.BaseClasses.PartialVLEFluidFunctions.steamMassFraction_phxi .TILMedia.BaseClasses.PartialVLEFluidFunctions.steamMassFraction_phxipartial function steamMassFraction_phxi = TILMedia.BaseClasses.PartialVLEFluidFunctionPrototypes.steamMassFraction_phxi;