calulate phase boundary property record from dimensionless Helmholtz function
function helmholtzToBoundaryProps3rd extends Modelica.Icons.Function; input ThermoSysPro.Properties.WaterSteam.Common.HelmholtzDerivs3rd f "dimensionless derivatives of Helmholtz function"; output ThermoSysPro.Properties.WaterSteam.Common.PhaseBoundaryProperties3rd sat "phase boundary property record"; end helmholtzToBoundaryProps3rd;