In the current implementation it can happen that a GraphEventSubscriber is created without a parameter and later subscribed to a publisher. In this case the subscriber is never unsubscribed.
Also the GraphEventSubscriber can only be subscribed to one publisher at a time now.
In the current implementation it can happen that a GraphEventSubscriber is created without a parameter and later subscribed to a publisher. In this case the subscriber is never unsubscribed.
Also the GraphEventSubscriber can only be subscribed to one publisher at a time now.