.TILMedia.BaseClasses.PartialGasFunctions.gaseousMassFraction_psxi .TILMedia.BaseClasses.PartialGasFunctions.gaseousMassFraction_psxipartial function gaseousMassFraction_psxi = TILMedia.BaseClasses.PartialGasFunctionPrototypes.gaseousMassFraction_psxi;