Using Crimson with a generic class

[Reprevise]

I have a class like this:

class ApiResponse<T> extends Equatable {
  final List<CustomError>? errors;
  final T? data;
  const ApiResponse({
    this.errors,
    this.data,
  });

  T get dataOrThrow => data ?? (throw error!);

  CustomError? get error {
    // ...
  }

  factory ApiResponse.fromJson(
    Map<String, dynamic> map,
    T Function(Map<String, dynamic> json) create,
  ) {
    return ApiResponse<T>(
      errors: map['errors'] != null
          ? List<CustomError>.from(
              map['errors']?.map((x) => CustomError.fromJson(x)),
            )
          : null,
      data: map['data'] != null ? create(map['data']) : null,
    );
  }

  factory ApiResponse.fromJsonList(
    Map<String, dynamic> map,
    T Function(List<Map<String, dynamic>>) create, {
    List<dynamic> Function(Map<String, dynamic> json)? list,
  }) {
    T? getData() {
      if (map['data'] == null) return null;
      final items = List<Map?>.from(
        list?.call(map['data'] as Map<String, dynamic>) ??
            map['data'] as List<dynamic>,
      );
      return create(
        items.whereNotNull().map((e) => e as Map<String, dynamic>).toList(),
      );
    }

    return ApiResponse<T>(
      errors: map['errors'] != null
          ? List<CustomError>.from(
              map['errors'].map((x) => CustomError.fromJson(x)),
            )
          : null,
      data: getData(),
    );
  }

  @override
  List<Object?> get props => [errors, data];
}

I use it as so:

return ApiResponse.fromJsonList(
  response.data as Map<String, dynamic>,
  (json) => json.map(MyModel.fromJson).toList(),
  list: (json) => List<Map?>.from(json['items']),
).data!;

How can I do this with Crimson?

[simc]

Created issue #9