class Article {
  String articleId;

  /// The quantity of delivered gas cylinders.
  double quantity;

  /// The price per cylinder in euros.
  double pricePerQuantity;

  /// The price of the deposit in euros per cylinder.
  double depositPricePerQuantity;

  /// The amount of cylinders delivered.
  double quantityDelivered;

  /// The amount of cylinders returned by the customer.
  double quantityReturned;

  /// The amount of cylinders left to be deposited.
  double quantityToDeposit;

  Article({
    required this.articleId,
    required this.quantity,
    required this.pricePerQuantity,
    required this.depositPricePerQuantity,
    required this.quantityDelivered,
    required this.quantityReturned,
    required this.quantityToDeposit,
  });
}