/**
* Do any deferred updates and clear the list
*
+ * If $stage is self::ALL then the queue of PRESEND updates will be resolved,
+ * followed by the queue of POSTSEND updates
+ *
* @param string $mode Use "enqueue" to use the job queue when possible [Default: "run"]
* @param int $stage DeferredUpdates constant (PRESEND, POSTSEND, or ALL) (since 1.27)
*/