This function should be used by default in order to calculate the thermodynamic state record used as input by many functions.
Example:
parameter Medium.AbsolutePressure p = 3e5;
parameter Medium.SpecificEnthalpy h = 4.2e5;
Medium.Density rho;
equation
rho = Medium.density(setState_phX(p, h, fill(0, Medium.nX)));