.TILMedia.BaseClasses.PartialGasFunctions.gaseousMassFraction_phxi .TILMedia.BaseClasses.PartialGasFunctions.gaseousMassFraction_phxipartial function gaseousMassFraction_phxi = TILMedia.BaseClasses.PartialGasFunctionPrototypes.gaseousMassFraction_phxi;