private val events = LinkedBlockingDeque<Any>()
  private var cancel = false

  fun enqueueCancel() {
    cancel = true
  }

  override fun onOpen(
    eventSource: EventSource,
    response: Response,
  ) {
    get().log("[ES] onOpen", Platform.INFO, null)
    events.add(Open(eventSource, response))
    drainCancelQueue(eventSource)
  }

  override fun onEvent(
    eventSource: EventSource,
    id: String?,

   * events.
   */
  open fun onOpen(
    eventSource: EventSource,
    response: Response,
  ) {
  }

  /**
   * Invoked when a new event has been sent to the client.
   *
   * @param id The `id` line of the event, might be null.
   * @param type The `event` line of the event, might be null.
   * @param data The `data` line of the event.
   */
  open fun onEvent(
    eventSource: EventSource,

	public fun onEvent (Lokhttp3/sse/EventSource;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
	public fun onFailure (Lokhttp3/sse/EventSource;Ljava/lang/Throwable;Lokhttp3/Response;)V
	public fun onOpen (Lokhttp3/sse/EventSource;Lokhttp3/Response;)V
}

public final class okhttp3/sse/EventSources {
	public static final field INSTANCE Lokhttp3/sse/EventSources;

      val response = response.stripBody()

      val reader = ServerSentEventReader(body.source(), this)
      try {
        if (!canceled) {
          listener.onOpen(this, response)
          while (!canceled && reader.processNextEvent()) {
          }
        }
      } catch (e: Exception) {
        val exception =
          when {

          """
          |data: hey
          |
          |
          """.trimMargin(),
        ).setHeader("content-type", "text/event-stream")
        .build(),
    )
    listener.enqueueCancel() // Will cancel in onOpen().
    val request = Request.Builder().url(server.url("/")).build()
    val response = client.newCall(request).execute()
    response.processEventSource(listener)
    listener.assertOpen()

    CompletableFuture<Void> future = new CompletableFuture<>();
    factory.newEventSource(request, new EventSourceListener() {
      @Override
      public void onOpen(@NotNull EventSource eventSource, @NotNull Response response) {
        try {
          assertEquals("text/event-stream", response.request().header("Accept"));
        } catch (Exception e) {

        .pingInterval(Duration.ofMillis(500))
        .build()

    // Stall in onOpen to prevent pongs from being sent.
    val latch = CountDownLatch(1)
    webServer.enqueue(
      MockResponse
        .Builder()
        .webSocketUpgrade(
          object : WebSocketListener() {
            override fun onOpen(
              webSocket: WebSocket,
              response: Response,
            ) {

          """
          |data: hey
          |
          |
          """.trimMargin(),
        ).setHeader("content-type", "text/event-stream")
        .build(),
    )
    listener.enqueueCancel() // Will cancel in onOpen().
    newEventSource()
    listener.assertOpen()
    listener.assertFailure("canceled")
  }

  @Test
  fun badContentType() {
    server.enqueue(
      MockResponse
        .Builder()

      )
  }

  /** Receive frames until there are no more. Invoked only by the reader thread. */
  @Throws(IOException::class)
  fun loopReader(response: Response) {
    try {
      listener.onOpen(this@RealWebSocket, response)
      while (receivedCloseCode == -1) {
        // This method call results in one or more onRead* methods being called on this thread.
        reader!!.processNextFrame()
      }

        override fun cancel() = TODO()
      }
  }

  @Test
  fun webSocketListener() {
    val webSocketListener =
      object : WebSocketListener() {
        override fun onOpen(
          webSocket: WebSocket,
          response: Response,
        ) = TODO()

        override fun onMessage(
          webSocket: WebSocket,
          text: String,
        ) = TODO()