public SubscriptionStateChangedEventArgs(SubscriptionResponse subscription)
 {
     _subscription = subscription;
 }
 public SubscriptionEventArgs(SubscriptionResponse subscription)
 {
     _subscription = subscription;
 }
 public RenewalEventArgs(SubscriptionResponse subscription)
 {
     _subscription = subscription;
 }
 public BillingDateChangedEventArgs(SubscriptionResponse subscription)
 {
     _subscription = subscription;
 }