Flutter freezed json generator with mixin good practice to use

Question

How I can use mixin in my freezed class for good json convertion varibels from mixin! how i can use converter there?

import 'package:freezed_annotation/freezed_annotation.dart';

part 'aqsp_stage.freezed.dart';
part 'aqsp_stage.g.dart';

@freezed
class AQSPStage with _$AQSPStage, AQSPStageMixin {
  const factory AQSPStage.notify({
    required String message,
    @Default(AQNotificationType.notify) AQNotificationType aqNotificationType,
  }) = NotifyStage;

  const factory AQSPStage.form({
    
  })=DataStage;

  factory AQSPStage.fromJson(Map<String, dynamic> json) =>
      _$AQSPStageFromJson(json);
}

enum AQNotificationType {
  email,
  snackBar,
  alert,
  notify,
}

mixin AQSPStageMixin{
  String? _id;
  set setId(String id)=> _id=id;
  String? get getID=> _id;
}

My mixin it without converter. it is posible?