// Create different implementations
        SearchLogEvent event1 = new TestSearchLogEvent("id1", 1L, "type1");
        SearchLogEvent event2 = new NullSearchLogEvent();
        SearchLogEvent event3 = new EmptySearchLogEvent();

        // Test polymorphic behavior
        SearchLogEvent[] events = { event1, event2, event3 };

        for (SearchLogEvent event : events) {
            // All methods should be callable without exceptions

In this case, the `startup` event handler function will initialize the items "database" (just a `dict`) with some values.

You can add more than one event handler function.

And your application won't start receiving requests until all the `startup` event handlers have completed.

### `shutdown` event { #shutdown-event }

To add a function that should be run when the application is shutting down, declare it with the event `"shutdown"`:

        ErrorToWarnRewritePolicy policy = new ErrorToWarnRewritePolicy(loggerNames);

        LogEvent event =
                Log4jLogEvent.newBuilder().setLoggerName(null).setLevel(Level.ERROR).setMessage(new SimpleMessage("test message")).build();

        LogEvent result = policy.rewrite(event);
        assertSame(event, result);
    }

    public void test_rewrite_error_to_warn_matching_logger() {

  }

  /**
   * Enqueues an event to be run on currently known listeners.
   *
   * <p>The {@code toString} method of the Event itself will be used to describe the event in the
   * case of an error.
   *
   * @param event the callback to execute on {@link #dispatch}
   */
  public void enqueue(Event<L> event) {
    enqueueHelper(event, event);
  }

  /**

  }

  public void testDeadEventPosting() {
    GhostCatcher catcher = new GhostCatcher();
    bus.register(catcher);

    bus.post(new DeadEvent(this, EVENT));

    List<DeadEvent> events = catcher.getEvents();
    assertEquals("The explicit DeadEvent should be delivered.", 1, events.size());
    assertEquals("The dead event must not be re-wrapped.", EVENT, events.get(0).getEvent());

          }
        };

    @Override
    void dispatch(Object event, Iterator<Subscriber> subscribers) {
      checkNotNull(event);
      checkNotNull(subscribers);
      // requireNonNull accommodates Android's @RecentlyNullable annotation on ThreadLocal.get
      Queue<Event> queueForThread = requireNonNull(queue.get());
      queueForThread.offer(new Event(event, subscribers));

      if (!dispatching.get()) {

        }

        ArtifactTransferEvent event = wrap(transferEvent);
        event.setDataBuffer(buffer);
        event.setDataOffset(0);
        event.setDataLength(length);
        event.setTransferredBytes(transferred);

        listener.transferProgress(event);
    }

    @Override
    public void transferStarted(TransferEvent transferEvent) {

     */
    NODE_AVAILABLE(7);

    private final int value;

    /**
     * Creates a new WitnessEventType with the specified value.
     *
     * @param value the numeric event type value
     */
    WitnessEventType(int value) {
        this.value = value;
    }

    /**
     * Gets the numeric event type value.
     *
     * @return the event type value
     */
    public int getValue() {

  fun assertExhausted() {
    assertThat(events).isEmpty()
  }

  fun assertEvent(
    id: String?,
    type: String?,
    data: String,
  ) {
    assertThat(nextEvent()).isEqualTo(Event(id, type, data))
  }

  fun assertOpen(): EventSource {
    val event = nextEvent() as Open
    return event.eventSource
  }

  fun assertClose() {
    nextEvent() as Closed
  }

  fun assertFailure(

      } finally {
        ready = true;
      }
    }

    @Subscribe
    public void listenForDoubles(Double event) {
      assertTrue("I received an event when I wasn't ready!", ready);
      eventsReceived.add(event);
    }
  }

  public void testEventOrderingIsPredictable() {
    EventProcessor processor = new EventProcessor();
    bus.register(processor);

    EventRecorder recorder = new EventRecorder();