public void Bind(IObservable <IEventMessage> firehose, long connectionId, long subscriptionId, CancellationToken cancellationToken)
{
CurrentConnectionId = connectionId;
CurrentSubscriptionId = subscriptionId;
var filteredFirehose = EventFilter.Invoke(firehose.Where(x => x.Id == subscriptionId).OfType <TEventMessage>());
filteredFirehose.Subscribe(SubscriptionEventStream.OnNext, () => { }, cancellationToken);
}
