Sync - example - annotate the entity with @sync()

Author: Ivan Dlugos

example/flutter/objectbox_demo_sync/lib/main.dart

@@ -10,6 +10,7 @@ import 'package:objectbox/observable.dart';
 import 'objectbox.g.dart';
 
 @Entity()
+@Sync()
 class Note {
   @Id()
   int id;

example/flutter/objectbox_demo_sync/lib/objectbox-model.json

@@ -7,6 +7,7 @@
       "id": "1:2802681814019499133",
       "lastPropertyId": "4:6451339597165131221",
       "name": "Note",
+      "flags": 2,
       "properties": [
         {
           "id": "1:3178873177797362769",