class Account { Account({required this.id, required this.label, this.balance}); Account.fromMap(Map map) : this.id = map['id'] == null ? 0 : int.parse(map['id'] as String), this.label = (map['label'] ?? '') as String, this.balance = (map['balance'] ?? '0.00') as String; final int id; final String label; final String? balance; }