How to use the petab.condition_table_is_parameter_free function in petab

def compile_model(self):
        """
        Compile the model. If the output folder exists already, it is first
        deleted.
        """
        # check prerequisites
        if not petab.condition_table_is_parameter_free(
                self.petab_problem.condition_df):
            raise AssertionError(
                "Parameter dependent conditions in the condition file "
                "are not yet supported.")

        # delete output directory
        if os.path.exists(self.output_folder):
            shutil.rmtree(self.output_folder)

        # constant parameters
        condition_columns = self.petab_problem.condition_df.columns.values
        constant_parameter_ids = list(
            set(condition_columns) - {'conditionId', 'conditionName'}
        )

        # observables

def compile_model(self):
        """
        Compile the model. If the output folder exists already, it is first
        deleted.
        """

        # check prerequisites
        if not petab.condition_table_is_parameter_free(
                self.petab_problem.condition_df):
            raise AssertionError(
                "Parameter dependent conditions in the condition file "
                "are not yet supported.")

        # delete output directory
        if os.path.exists(self.output_folder):
            shutil.rmtree(self.output_folder)

        # init sbml importer
        sbml_importer = amici.SbmlImporter(self.petab_problem.sbml_file)

        # constant parameters
        condition_columns = self.petab_problem.condition_df.columns.values
        constant_parameter_ids = list(
            set(condition_columns) - {'conditionId', 'conditionName'}