samples/web/github_dataviz/lib/data/user.dart

class User {
  int id;
  String username;
  String avatarUrl;

  User(this.id, this.username, this.avatarUrl);

  static User fromJson(Map<String, dynamic> jsonMap) {
    User user = User(jsonMap['id'], jsonMap['login'], jsonMap['avatar_url']);
    return user;
  }
}