Method has_hessian_operator

interfaces/Python/cpp_classes/PythonModel.cpp:40–42

   }

   bool PythonModel::has_hessian_operator() const {
      return this->user_model.lagrangian_hessian_operator.has_value();
   }

   bool PythonModel::has_hessian_matrix() const {
      return this->user_model.lagrangian_hessian.has_value();