* @since 1.21
*
* @param WikiPage $page The deleted page
- * @param ParserOutput $parserOutput Optional parser output object
+ * @param ParserOutput|null $parserOutput Optional parser output object
* for efficient access to meta-information about the content object.
* Provide if you have one handy.
*
- * @return DataUpdate[] A list of DataUpdate instances that will clean up the
+ * @return DeferrableUpdate[] A list of DeferrableUpdate instances that will clean up the
* database after deletion.
*/
public function getDeletionUpdates( WikiPage $page,