val response = call.execute()
    assertThat(response.body.string()).isEqualTo("ABC")
    assertThat(response.protocol).isEqualTo(protocol)

    // Confirm a single ping was sent and received, and its reply was sent and received.
    val logs = testLogHandler.takeAll()
    assertThat(countFrames(logs, "FINE: >> 0x00000000     8 PING          "))
      .isEqualTo(1)

 *  New: `okhttp-sse` is an early preview of Server-Sent Events (SSE). This feature is incomplete
    and is only suitable for experimental use.
 *  New: MockWebServer now supports client authentication (mutual TLS). Call `requestClientAuth()`
    to permit an optional client certificate or `requireClientAuth()` to require one.
 *  New: `RecordedRequest.getHandshake()` returns the HTTPS handshake of a request sent to
    `MockWebServer`.

 * the values are optional and names may be repeated.
 *
 * ### Fragment
 *
 * The fragment is optional: it can be null, empty, or non-empty. Unlike host, port, path, and
 * query the fragment is not sent to the webserver: it's private to the client.
 *
 * ## Encoding
 *
 * Each component must be encoded before it is embedded in the complete URL. As we saw above, the

  @get:JvmName("writeTimeoutMillis")
  val writeTimeoutMillis: Int = builder.writeTimeout

  /** Web socket and HTTP/2 ping interval (in milliseconds). By default pings are not sent. */
  @get:JvmName("pingIntervalMillis")
  val pingIntervalMillis: Int = builder.pingInterval

  /** Web socket close timeout (in milliseconds). */
  @get:JvmName("webSocketCloseTimeout")

  }

  /**
   * Webservers may set the initial window size to zero, which is a special case because it means
   * that we have to flush headers immediately before any request body can be sent.
   * https://github.com/square/okhttp/issues/2543
   */
  @Test fun peerSetsZeroFlowControl() {
    peer.setClient(true)

    // Write the mocking script.