* MCR migration note: this replaces Revision::getPrevious
*
* @param RevisionRecord $rev
- * @param Title $title if known (optional)
+ * @param Title|null $title if known (optional)
*
* @return RevisionRecord|null
*/
* MCR migration note: this replaces Revision::getNext
*
* @param RevisionRecord $rev
- * @param Title $title if known (optional)
+ * @param Title|null $title if known (optional)
*
* @return RevisionRecord|null
*/