Update migration doc
@@ -83,6 +83,9 @@ counterparts on `Datastore`:
* `deleteDocumentFromRevision` has been renamed `delete`
* `deleteDocument` has been renamed `delete`
+The `getConflictedIds` method now returns `Iterable<String>`. This
+allows the result to be used in an enhanced `for` loop.
+
The `throws` clauses on `Database` methods are different to those on
their counterparts in `Datastore`. Code which calls these methods may
have to be adjusted to catch different exceptions. See
