* id fields ('rc_cur_id', 'rc_this_oldid', 'rc_last_oldid')
* if false (default)
* @param array|null &$startFrom Continuation value: [ string $rcTimestamp, int $rcId ]
- * @return array of pairs ( WatchedItem $watchedItem, string[] $recentChangeInfo ),
+ * @return array[] Array of pairs ( WatchedItem $watchedItem, string[] $recentChangeInfo ),
* where $recentChangeInfo contains the following keys:
* - 'rc_id',
* - 'rc_namespace',