val responseHeadersEnd = listener.removeUpToEvent<RequestHeadersEnd>()
      MatcherAssert.assertThat(
        "request header length",
        responseHeadersEnd.headerLength,
        requestHeaderLength,
      )
    } else {
      assertThat(listener.recordedEventTypes())
        .doesNotContain("RequestHeadersEnd")
    }
    if (requestBodyBytes != null) {

        ),
      ).assertLogMatch(Regex("""requestHeadersStart"""))
      .assertLogMatch(Regex("""requestHeadersEnd"""))
      .assertLogMatch(Regex("""responseHeadersStart"""))
      .assertLogMatch(Regex("""responseHeadersEnd: Response\{protocol=http/1\.1, code=200, message=OK, url=$url\}"""))

      "ProxySelectStart",
      "ProxySelectEnd",
      "DnsStart",
      "DnsEnd",
      "ConnectStart",
      "ConnectEnd",
      "ConnectionAcquired",
      "RequestHeadersStart",
      "RequestHeadersEnd",
      "ResponseHeadersStart",
      "ResponseHeadersEnd",
      "FollowUpDecision",
      "ResponseBodyStart",
      "ResponseBodyEnd",
      "ConnectionReleased",
      "CallEnd",
    )
  }

      expectedEvents += "SecureConnectEnd"
    }
    expectedEvents += "ConnectEnd"
    expectedEvents += "ConnectionAcquired"
    expectedEvents += "RequestHeadersStart"
    expectedEvents += "RequestHeadersEnd"
    expectedEvents += "RequestBodyStart"
    // ... but we can read the response even after writing the request fails.
    expectedEvents += "RequestFailed"
    expectedEvents += "ResponseHeadersStart"

      "ConnectEnd",
      "ConnectionAcquired",
      "RequestHeadersStart",
      "RequestHeadersEnd",
      "RequestBodyStart",
      "ResponseHeadersStart",
      "ResponseHeadersEnd",
      "ResponseBodyStart",
      "ResponseBodyEnd",
      "FollowUpDecision",
      "RequestHeadersStart",
      "RequestHeadersEnd",
      "ResponseHeadersStart",
      "ResponseHeadersEnd",
      "FollowUpDecision",

      "ProxySelectStart",
      "ProxySelectEnd",
      "DnsStart",
      "DnsEnd",
      "ConnectStart",
      "ConnectEnd",
      "ConnectionAcquired",
      "RequestHeadersStart",
      "RequestHeadersEnd",
      "ResponseHeadersStart",
      "ResponseHeadersEnd",
      "FollowUpDecision",
      "ResponseBodyStart",
      "ResponseBodyEnd",
      "ConnectionReleased",
      "CallEnd",
    )
  }

        "DnsEnd",
        "ConnectStart",
        "SecureConnectStart",
        "SecureConnectEnd",
        "ConnectEnd",
        "ConnectionAcquired",
        "RequestHeadersStart",
        "RequestHeadersEnd",
        "ResponseHeadersStart",
        "ResponseHeadersEnd",
        "FollowUpDecision",
        "ResponseBodyStart",
        "ResponseBodyEnd",
        "ConnectionReleased",
        "CallEnd",

    // JDK 14
    // CallStart, ProxySelectStart, ProxySelectEnd, DnsStart, DnsEnd, ConnectStart, SecureConnectStart,
    // SecureConnectEnd, ConnectEnd, ConnectionAcquired, RequestHeadersStart, RequestHeadersEnd,
    // ResponseFailed, ConnectionReleased, CallFailed
    // JDK 8
    // CallStart, ProxySelectStart, ProxySelectEnd, DnsStart, DnsEnd, ConnectStart, SecureConnectStart,
    // ConnectFailed, CallFailed

  @Throws(IOException::class)
  fun writeRequestHeaders(request: Request) {
    try {
      eventListener.requestHeadersStart(call)
      codec.writeRequestHeaders(request)
      eventListener.requestHeadersEnd(call, request)
    } catch (e: IOException) {
      eventListener.requestFailed(call, e)
      trackFailure(e)
      throw e
    }
  }

  @Throws(IOException::class)
  fun createRequestBody(

        override fun connectionReleased(
          call: Call,
          connection: Connection,
        ) = TODO()

        override fun requestHeadersStart(call: Call) = TODO()

        override fun requestHeadersEnd(
          call: Call,
          request: Request,
        ) = TODO()

        override fun requestBodyStart(call: Call) = TODO()

        override fun requestBodyEnd(
          call: Call,