bus.unregister(catcher1);
    bus.post(EVENT);

    assertEquals(
        "Shouldn't catch any more events when unregistered.", expectedEvents, catcher1.getEvents());
    assertEquals("Two correct events should be delivered.", expectedEvents, catcher2.getEvents());

    assertThrows(IllegalArgumentException.class, () -> bus.unregister(catcher1));

    bus.unregister(catcher2);

    bus.unregister(catcher1);
    bus.post(EVENT);

    assertEquals(
        "Shouldn't catch any more events when unregistered.", expectedEvents, catcher1.getEvents());
    assertEquals("Two correct events should be delivered.", expectedEvents, catcher2.getEvents());

    assertThrows(IllegalArgumentException.class, () -> bus.unregister(catcher1));

    bus.unregister(catcher2);

            return OptionalThing.empty();
        }
    }

    /**
     * Unregisters a scheduled job from the job manager.
     *
     * @param scheduledJob the scheduled job to unregister
     * @throws ScheduledJobException if the job cannot be unregistered
     */
    public void unregister(final ScheduledJob scheduledJob) {
        try {

   */
  public void register(Object object) {
    subscribers.register(object);
  }

  /**
   * Unregisters all subscriber methods on a registered {@code object}.
   *
   * @param object object whose subscriber methods should be unregistered.
   * @throws IllegalArgumentException if the object was not previously registered.
   */

                WitnessUnregisterResponse response = rpcClient.unregister(request);
                
                if (response.isSuccess()) {
                    registrations.remove(registration.getRegistrationId());
                    listeners.remove(registration.getRegistrationId());
                    
                    log.info("Successfully unregistered witness: {}", 
                        registration.getRegistrationId());

* Minikube version 0.22.2 or lower does not work with kubectl version 1.8 or higher. This issue is caused by the presence of an unregistered type in the minikube API server. New versions of kubectl force validate the OpenAPI schema, which is not registered with all known types in the minikube API server.

For more information, see [#1996](https://github.com/kubernetes/minikube/issues/1996).

            MoreObjects.firstNonNull(subscribers.putIfAbsent(eventType, newSet), newSet);
      }

      eventSubscribers.addAll(eventMethodsInListener);
    }
  }

  /** Unregisters all subscribers on the given listener object. */
  void unregister(Object listener) {
    Multimap<Class<?>, Subscriber> listenerMethods = findAllSubscribers(listener);

        assertArgumentNotNull("disposable", disposable);
        disposables.addFirst(disposable);
    }

    /**
     * Unregisters a disposable resource.
     *
     * @param disposable
     *            A disposable resource. Must not be {@literal null}.
     */
    public static synchronized void remove(final Disposable disposable) {
        assertArgumentNotNull("disposable", disposable);

	LoggerWebhookName = "subnet"
)

// Upload given file content (payload) to specified URL
func (c Config) Upload(reqURL string, filename string, payload []byte) (string, error) {
	if !c.Registered() {
		return "", errors.New("Deployment is not registered with SUBNET. Please register the deployment via 'mc license register ALIAS'")
	}

	var body bytes.Buffer
	writer := multipart.NewWriter(&body)

    registry.register(s2);

    registry.unregister(s1);
    assertEquals(1, registry.getSubscribersForTesting(String.class).size());

    registry.unregister(s2);
    assertTrue(registry.getSubscribersForTesting(String.class).isEmpty());
  }

  public void testUnregister_notRegistered() {
    assertThrows(IllegalArgumentException.class, () -> registry.unregister(new StringSubscriber()));