Json converter for lists of integers

in_list_converter.dart

import 'dart:convert';

import 'package:json_annotation/json_annotation.dart';

class IntListConverter implements JsonConverter<List<int>?, String> {
  const IntListConverter();

  @override
  List<int>? fromJson(String? json) => List<int>.from(jsonDecode(json ?? '[]').map((e) => e.toInt()));

  @override
  String toJson(List<int>? object) => jsonEncode(object);
}