@SuppressWarnings("rawtypes") @Override public boolean unsubscribe(SubscriptionHandle subscriptionId) { Preconditions.checkNotNull(subscriptionId, "subscriptionId must not be null"); Preconditions.checkArgument(Objects.equal(subscriber, ((Subscription) subscriptionId).subscriber), "The subscriptionId is for a different "+subscriber+"; expected "+((Subscription) subscriptionId).subscriber); return manager.unsubscribe(subscriptionId); }