func init() {
	// Inject metrics.
	ioutilx.OsOpenFile = OpenFile
	ioutilx.OpenFileDirectIO = OpenFileDirectIO
	ioutilx.OsOpen = Open
}

type osMetrics struct {
	// All fields must be accessed atomically and aligned.
	operations [osMetricLast]uint64
	latency    [osMetricLast]lockedLastMinuteLatency
}

// time an os action.
func (o *osMetrics) time(s osMetric) func() {
	startTime := time.Now()

### Bug or Regression

   * `public final Error getCause()`.)
   */

  /**
   * Creates a new instance with {@code null} as its detail message and no cause.
   *
   * @deprecated Prefer {@linkplain ExecutionError(Error)} a constructor that accepts a cause: Users
   *     of this class typically expect for instances to have a non-null cause. At the moment, you
   *     can <i>usually</i> still preserve behavior by passing an explicit {@code null} cause. Note,

    val empty = CompressionInterceptor()
    val client =
      clientTestRule
        .newClientBuilder()
        .addInterceptor(empty)
        .addInterceptor { chain ->
          assertThat(chain.request().header("Accept-Encoding")).isNull()
          Response
            .Builder()
            .request(chain.request())
            .protocol(Protocol.HTTP_1_1)
            .code(200)
            .message("OK")

    }

    @Override public SocketAddress getLocalSocketAddress() {
      return endpoint;
    }

    @Override public Socket accept() throws IOException {
      try {
        UnixSocketChannel channel = serverSocketChannel.accept();
        return new TunnelingUnixSocket(path, channel, endpoint);
      } catch (ClosedChannelException e) {
        SocketException exception = new SocketException();

      @JvmName("create")
      fun Call.Factory.asEventSourceFactory(): Factory =
        Factory { request, listener ->
          val actualRequest =
            if (request.header("Accept") == null) {
              request.newBuilder().addHeader("Accept", "text/event-stream").build()
            } else {
              request
            }

          this.newCall(actualRequest).enqueueEventSource(listener)
        }
    }
  }

	}

	// Start a goroutine for the server to accept one connection
	// and read all the data sent on the connection,
	// reporting the number of bytes read on ch.
	ch := make(chan int, 1)
	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		defer wg.Done()

		tot := 0
		defer func() {
			ch <- tot
		}()

		serverConn, err := server.Accept()
		if err != nil {
			t.Error(err)
			return
		}

    /** Window size in bytes. */
    const val INITIAL_WINDOW_SIZE = 4

    /** HTTP/2: Size in bytes of the largest frame payload the sender will accept. */
    const val MAX_FRAME_SIZE = 5

    /** HTTP/2: Advisory only. Size in bytes of the largest header list the sender will accept. */
    const val MAX_HEADER_LIST_SIZE = 6

    /** Total number of settings. */
    const val COUNT = 10
  }

        public void connect(Consumer<HttpURLConnection> actionListener, Consumer<Exception> exceptionListener) {
            try {
                actionListener.accept(new MockHttpURLConnection(new URL(url)));
            } catch (MalformedURLException e) {
                exceptionListener.accept(e);
            }
        }
    }

    class MockHttpURLConnection extends HttpURLConnection {

        MockHttpURLConnection(URL u) {

            }
        }

        return s;
    }

    /**
     * Removes the leading directory separator from the specified filesystem path (if any). For platform-independent
     * behavior, this method accepts both the forward slash and the backward slash as separator.
     *
     * @param path The filesystem path, may be <code>null</code>.