public static function view_feedback_parameters() {
        return new external_function_parameters (
            array(
                'feedbackid' => new external_value(PARAM_INT, 'Feedback instance id'),
                'moduleviewed' => new external_value(PARAM_BOOL, 'If we need to mark the module as viewed for completion',
                    VALUE_DEFAULT, false),
                'courseid' => new external_value(PARAM_INT, 'Course where user completes the feedback (for site feedbacks only).',
                    VALUE_DEFAULT, 0),
            )
        );
    }