function der_densityDerivativeWRTpressure_phxi
extends TILMedia.BaseClasses.PartialGasObjectFunction;
input SI.AbsolutePressure p "Pressure";
input SI.SpecificEnthalpy h "Specific enthalpy";
input SI.MassFraction[:] xi "Mass fractions of the first nc-1 components";
input TILMedia.Internals.TILMediaExternalObject gasPointer;
input Real der_p "Pressure";
input Real der_h "Specific enthalpy";
input Real[:] der_xi "Mass fractions of the first nc-1 components";
output Real der_drhodp_hxi "Derivative of density wrt pressure at specific enthalpy and mass fraction";
end der_densityDerivativeWRTpressure_phxi;