- * Application may use this information to detect user level edit conflicts. Edit conflicts
- * can be resolved by performing a 3-way merge, using the revision returned by this method as
- * the common base of the conflicting revisions, namely the new revision being saved,
- * and the revision returned by grabParentRevision().
- *
- * @return bool|int The ID of the base revision, 0 if the base is a non-existing page, false
- * if no base revision was specified.
+ * @return bool|int The original revision id, or false if no earlier revision is known to be
+ * repeated or restored by this update.