Use freezed_annotation

Author: mono0926

freezed_provider_value_notifier/lib/todo_list_model.dart

@@ -5,14 +5,15 @@
 import 'package:flutter/widgets.dart';
 import 'package:flutter/foundation.dart';
 import 'package:collection/collection.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:freezed_provider_value_notifier/models.dart';
 import 'package:todos_repository_core/todos_repository_core.dart';
 
 part 'todo_list_model.freezed.dart';
 
 enum VisibilityFilter { all, active, completed }
 
-@immutable
+@freezed
 abstract class TodoList with _$TodoList {
   factory TodoList(
     List<Todo> todos, {

freezed_provider_value_notifier/lib/todo_list_model.freezed.dart

@@ -7,6 +7,7 @@ environment:
   sdk: ">=2.6.0 <3.0.0"
 
 dependencies:
+  freezed_annotation:
   provider: ^4.1.0-dev
   todos_repository_local_storage:
     path: ../todos_repository_local_storage