.TILMedia.BaseClasses.PartialGasObjectFunctions.isothermalCompressibility_phxi .TILMedia.BaseClasses.PartialGasObjectFunctions.isothermalCompressibility_phxipartial function isothermalCompressibility_phxi = TILMedia.BaseClasses.PartialGasObjectFunctionPrototypes.isothermalCompressibility_phxi;