public SubscriptionNotification(Account account, Subscription subscription,
                                 SubscriptionNotificationType notificationType)
     : base(account)
 {
     Subscription = subscription;
     SubscriptionNotificationType = notificationType;
 }
 protected NotificationBase(Account account)
 {
     Account = account;
 }
 protected NotificationBase(XDocument document)
 {
     Account = new Account(document);
 }
 public PaymentNotification(Account account, Transaction transaction, PaymentNotificationType type)
     : base(account)
 {
     PaymentNotificationType = type;
     Transaction = transaction;
 }
 public AccountNotification(Account account, AccountNotificationType notificationType)
     : base(account)
 {
     AccountNotificationType = notificationType;
 }