Should fixed_time_step parameter default be True? about ngen-cal HOT 3 CLOSED

/** Whether this particular model has a time step size that cannot be changed internally or externally. */
            bool bmi_model_has_fixed_time_step = true;

            /**
             * Get model time step size pointer, using lazy loading when fixed.
             *
             * Get a pointer to the value of the backing model's time step size.  If the model is configured to have
             * fixed time step size, return the pointer from `bmi_model_time_step_size`, potentially after it is lazily
             * loaded.  If the model's time step is not fixed, retrieve it directly from the model in real time, and do
             * not set `bmi_model_time_step_size`.
             *
             * @return A pointer to the value of the backing model's time step size.
             * @see retrieve_bmi_model_time_step_size
             */
            inline std::shared_ptr<double> get_bmi_model_time_step_size_ptr() {
                if (bmi_model_time_step_size == nullptr) {
                    if (!bmi_model_has_fixed_time_step)
                        return retrieve_bmi_model_time_step_size();
                    else
                        bmi_model_time_step_size = retrieve_bmi_model_time_step_size();
                }
                return bmi_model_time_step_size;
            }