public static function get_forum_discussions_paginated_returns() {
        return new external_single_structure(
            array(
                'discussions' => new external_multiple_structure(
                        new external_single_structure(
                            array(
                                'id' => new external_value(PARAM_INT, 'Post id'),
                                'name' => new external_value(PARAM_TEXT, 'Discussion name'),
                                'groupid' => new external_value(PARAM_INT, 'Group id'),
                                'timemodified' => new external_value(PARAM_INT, 'Time modified'),
                                'usermodified' => new external_value(PARAM_INT, 'The id of the user who last modified'),
                                'timestart' => new external_value(PARAM_INT, 'Time discussion can start'),
                                'timeend' => new external_value(PARAM_INT, 'Time discussion ends'),
                                'discussion' => new external_value(PARAM_INT, 'Discussion id'),
                                'parent' => new external_value(PARAM_INT, 'Parent id'),
                                'userid' => new external_value(PARAM_INT, 'User who started the discussion id'),
                                'created' => new external_value(PARAM_INT, 'Creation time'),
                                'modified' => new external_value(PARAM_INT, 'Time modified'),
                                'mailed' => new external_value(PARAM_INT, 'Mailed?'),
                                'subject' => new external_value(PARAM_TEXT, 'The post subject'),
                                'message' => new external_value(PARAM_RAW, 'The post message'),
                                'messageformat' => new external_format_value('message'),
                                'messagetrust' => new external_value(PARAM_INT, 'Can we trust?'),
                                'messageinlinefiles' => new external_files('post message inline files', VALUE_OPTIONAL),
                                'attachment' => new external_value(PARAM_RAW, 'Has attachments?'),
                                'attachments' => new external_files('attachments', VALUE_OPTIONAL),
                                'totalscore' => new external_value(PARAM_INT, 'The post message total score'),
                                'mailnow' => new external_value(PARAM_INT, 'Mail now?'),
                                'userfullname' => new external_value(PARAM_TEXT, 'Post author full name'),
                                'usermodifiedfullname' => new external_value(PARAM_TEXT, 'Post modifier full name'),
                                'userpictureurl' => new external_value(PARAM_URL, 'Post author picture.'),
                                'usermodifiedpictureurl' => new external_value(PARAM_URL, 'Post modifier picture.'),
                                'numreplies' => new external_value(PARAM_INT, 'The number of replies in the discussion'),
                                'numunread' => new external_value(PARAM_INT, 'The number of unread discussions.'),
                                'pinned' => new external_value(PARAM_BOOL, 'Is the discussion pinned'),
                                'locked' => new external_value(PARAM_BOOL, 'Is the discussion locked'),
                                'canreply' => new external_value(PARAM_BOOL, 'Can the user reply to the discussion'),
                                'canlock' => new external_value(PARAM_BOOL, 'Can the user lock the discussion'),
                            ), 'post'
                        )
                    ),
                'warnings' => new external_warnings()
            )
        );
    }