*/
  fun cancel()

  fun interface Factory {
    /**
     * Creates a new event source and immediately returns it. Creating an event source initiates an
     * asynchronous process to connect the socket. Once that succeeds or fails, `listener` will be
     * notified. The caller must cancel the returned event source when it is no longer in use.
     */
    fun newEventSource(
      request: Request,
      listener: EventSourceListener,

    fun executeOn(executorService: ExecutorService) {
      client.dispatcher.assertLockNotHeld()

      var success = false
      try {
        executorService.execute(this)
        success = true
      } catch (e: RejectedExecutionException) {
        failRejected(e)
      } finally {
        if (!success) {
          client.dispatcher.finished(this) // This call is no longer running!
        }
      }
    }

            .readTimeout(500, TimeUnit.MILLISECONDS)
            .build()
        try {
          client1.newCall(request).execute().use { response ->
            println("Response 1 succeeded: $response")
          }
        } catch (e: IOException) {
          println("Response 1 failed: $e")
        }

        // Copy to customize OkHttp for this request.
        val client2 = client.newBuilder()