Potential Memory Leak: EventSink.subscribe() registers Contexts at the HttpServerRegistry, but EventSink.unsubscribe() does not unregister them.
EventSink.subscribe() registers Contexts via HttpServerRegistry.registerContext(), but EventSink.unsubscribe() does not unregister them. Hence, References to these Contexts remain in the Registry and the Contexts can hence not be removed by the Garbage Collector, which can potentially cause a Memory Leak.