.TILMedia.BaseClasses.PartialGasObjectFunctions.der_saturationHumidityRatio_phxi .TILMedia.BaseClasses.PartialGasObjectFunctions.der_saturationHumidityRatio_phxipartial function der_saturationHumidityRatio_phxi = TILMedia.BaseClasses.PartialGasObjectFunctionPrototypes.der_saturationHumidityRatio_phxi;