* @param <K> the most general type of keys this listener can listen for; for example {@code Object}
 *     if any key is acceptable
 * @param <V> the most general type of values this listener can listen for; for example {@code
 *     Object} if any key is acceptable
 * @author Charles Fry
 * @since 10.0
 */
@GwtCompatible
public interface RemovalListener<K, V> {
  /**
   * Notifies the listener that a removal occurred at some point in the past.

    }
    responseBody.close()
    assertEquals(if (connectionType == H2) 1 else 0, client.connectionPool.connectionCount())

    cancelLatch.await()

    val events = listener.eventSequence.filter { isConnectionEvent(it) }.map { it.name }
    listener.clearAllEvents()

    assertThat(events).startsWith("CallStart", "ConnectStart", "ConnectEnd", "ConnectionAcquired")
    if (cancelMode == CANCEL) {

  ForwardingFluentFuture(ListenableFuture<V> delegate) {
    this.delegate = checkNotNull(delegate);
  }

  @Override
  public void addListener(Runnable listener, Executor executor) {
    delegate.addListener(listener, executor);
  }

  @Override
  public boolean cancel(boolean mayInterruptIfRunning) {
    return delegate.cancel(mayInterruptIfRunning);
  }

  @Override

 * @author Colin Decker
 */
class Subscriber {

  /** Creates a {@code Subscriber} for {@code method} on {@code listener}. */
  static Subscriber create(EventBus bus, Object listener, Method method) {
    return isDeclaredThreadSafe(method)
        ? new Subscriber(bus, listener, method)
        : new SynchronizedSubscriber(bus, listener, method);
  }

  /** The event bus this subscriber belongs to. */
  @Weak private final EventBus bus;

    }
  }

  /** See https://api.slack.com/rtm. */
  public WebSocket rtm(HttpUrl url, WebSocketListener listener) {
    return httpClient.newWebSocket(new Request.Builder()
        .url(url)
        .build(), listener);
  }

  static final class SlackJsonAdapters {
    @ToJson String urlToJson(HttpUrl httpUrl) {
      return httpUrl.toString();
    }

    object : WebSocketListener() {
    }
  val dispatcher = Dispatcher(executor)
  val listener = RecordingEventListener()
  var client =
    clientTestRule
      .newClientBuilder()
      .dns { throw UnknownHostException() }
      .dispatcher(dispatcher)
      .eventListenerFactory(clientTestRule.wrap(listener))
      .build()

  @BeforeEach
  fun setUp() {
    dispatcher.maxRequests = 20

class SocketFailureTest {
  @RegisterExtension
  val platform = PlatformRule()

  val listener = SocketClosingEventListener()

  @RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

  @StartStop
  private val server = MockWebServer()

  private var client =
    clientTestRule
      .newClientBuilder()
      .eventListener(listener)
      .build()

  class SocketClosingEventListener : EventListener() {

        .code(200)
        .message("")
        .protocol(Protocol.HTTP_2)
        .build()
    val listener = loggingEventListenerFactory.create(call)
    listener.cacheConditionalHit(call, response)
    listener.cacheHit(call, response)
    listener.cacheMiss(call)
    listener.satisfactionFailure(call, response)
    logRecorder

  @StartStop
  private val server = MockWebServer()

  private var listener = RecordingEventListener()
  private val handshakeCertificates = platform.localhostHandshakeCertificates()
  private var client =
    clientTestRule
      .newClientBuilder()
      .eventListenerFactory(clientTestRule.wrap(listener))
      .build()

  @Test
  fun upgrade() {
    val socketHandler =
      MockSocketHandler()

  @RegisterExtension
  @JvmField
  var clientTestRule = OkHttpClientTestRule()

  private val listener = RecordingEventListener()
  private val handshakeCertificates = platform.localhostHandshakeCertificates()

  private var client =
    clientTestRule
      .newClientBuilder()
      .eventListenerFactory(clientTestRule.wrap(listener))
      .build()

  @StartStop
  private val server = MockWebServer()

  @BeforeEach