assertEquals("Event should be available.", EVENT, handler.context.getEvent());
    assertEquals("Subscriber should be available.", subscriber, handler.context.getSubscriber());
    assertEquals(
        "Method should be available.",
        subscriber.getClass().getMethod("throwExceptionOn", String.class),
        handler.context.getSubscriberMethod());
  }

    assertEquals("Event should be available.", EVENT, handler.context.getEvent());
    assertEquals("Subscriber should be available.", subscriber, handler.context.getSubscriber());
    assertEquals(
        "Method should be available.",
        subscriber.getClass().getMethod("throwExceptionOn", String.class),
        handler.context.getSubscriberMethod());
  }

          + method.getName()
          + '('
          + method.getParameterTypes()[0].getName()
          + ')'
          + " on subscriber "
          + context.getSubscriber()
          + " when dispatching event: "
          + context.getEvent();
    }
  }

    assertEquals(1, Iterators.size(registry.getSubscribers(1)));

    registry.register(new IntegerSubscriber());
    assertEquals(3, Iterators.size(registry.getSubscribers("")));
    assertEquals(1, Iterators.size(registry.getSubscribers(new Object())));
    assertEquals(2, Iterators.size(registry.getSubscribers(1)));
  }

  public void testGetSubscribers_returnsImmutableSnapshot() {

  }

  /**
   * Gets an iterator representing an immutable snapshot of all subscribers to the given event at
   * the time this method is called.
   */
  Iterator<Subscriber> getSubscribers(Object event) {
    ImmutableSet<Class<?>> eventTypes = flattenHierarchy(event.getClass());

    List<Iterator<Subscriber>> subscriberIterators =
        Lists.newArrayListWithCapacity(eventTypes.size());

                val = interpolate(org);
                if (org != val) {
                    mailingList.setName(val);
                }
                // Subscribe
                org = mailingList.getSubscribe();
                val = interpolate(org);
                if (org != val) {
                    mailingList.setSubscribe(val);
                }
                // Unsubscribe

    protected void mergeMailingList_Subscribe(
            MailingList target, MailingList source, boolean sourceDominant, Map<Object, Object> context) {
        String src = source.getSubscribe();
        if (src != null) {
            if (sourceDominant || target.getSubscribe() == null) {
                target.setSubscribe(src);
                target.setLocation("subscribe", source.getLocation("subscribe"));
            }
        }