fcs/lib/domain/entities/cargo.dart

class Cargo {
  String type;
  int price;
  int weight;
  Cargo({this.type, this.price, this.weight});

  @override
  String toString() {
    return type;
  }

  @override
  bool operator ==(Object other) => other is Cargo && other.type == type;

  @override
  int get hashCode => type.hashCode;
}