toJson will not add if we use freezed.

[b14cknc0d3]

Describe the bug toJson will not add if we use freezed. and show this warning

YourModel must provide a `toJson()` method which return a Map.

To Reproduce Steps to reproduce the behavior:

1. create a model with freezed

   
   @freezed
   class FoodTagCreateModel with _$FoodTagCreateModel {
   const factory FoodTagCreateModel({
   required String name,
   required String description,
   }) = _FoodTagCreateModel;
   
   factory FoodTagCreateModel.fromJson(Map<String, dynamic> json) =>
     _$FoodTagCreateModelFromJson(json);

}

2. generate a ResApi client that use that model and run build runner

@RestApi() abstract class CrudApi { factory CrudApi(Dio dio, {String? baseUrl}) = _CrudApi;

@POST('/api/v1/my-model') Future createAModel(@Body() MyModel body);

4. See error

MyModel must provide a toJson() method which return a Map. It is programmer's responsibility to make sure the MyModel is properly serialized

**Expected behavior**
If body is not Map force to add toJson() whether it has toJson() or not.

[b14cknc0d3]

@freezed
class FoodTagCreateModel with _$FoodTagCreateModel {
  const factory FoodTagCreateModel({
    required String name,
    required String description,
  }) = _FoodTagCreateModel;

  factory FoodTagCreateModel.fromJson(Map<String, dynamic> json) =>
      _$FoodTagCreateModelFromJson(json);
  @override
  Map<String, dynamic> toJson() => toJson();
}

Temporary solution.

[fryette]

Duplicate. Correct solution is:

1. Add build.yaml with next snippet

   freezed:
   runs_before:
    - json_serializable 
   json_serializable: 
    runs_before:
     - retrofit_generator