public static function get_combined_review_options_returns() {
        return new external_single_structure(
            array(
                'someoptions' => new external_multiple_structure(
                    new external_single_structure(
                        array(
                            'name' => new external_value(PARAM_ALPHANUMEXT, 'option name'),
                            'value' => new external_value(PARAM_INT, 'option value'),
                        )
                    )
                ),
                'alloptions' => new external_multiple_structure(
                    new external_single_structure(
                        array(
                            'name' => new external_value(PARAM_ALPHANUMEXT, 'option name'),
                            'value' => new external_value(PARAM_INT, 'option value'),
                        )
                    )
                ),
                'warnings' => new external_warnings(),
            )
        );
    }