.TILMedia.Internals.GasConfigurations.AnalyticDerivatives.GasObjectFunctions.speedOfSound_pTxi .TILMedia.Internals.GasConfigurations.AnalyticDerivatives.GasObjectFunctions.speedOfSound_pTxifunction speedOfSound_pTxi = TILMedia.Internals.GasObjectFunctions.speedOfSound_pTxi;