@Throws(InterruptedException::class)
  override fun dispatch(request: RecordedRequest): MockResponse {
    throw UnsupportedOperationException("unexpected call")
  }

  override fun peek(): MockResponse {
    throw UnsupportedOperationException("unexpected call")
  }

  fun enqueueResponse(response: MockResponse) {
    delegate.enqueueResponse(response.wrap())
  }

  override fun shutdown() {

implementation.  The HPACK test cases are in a separate git submodule, so to
initialize them, you must run:

    git submodule init
    git submodule update

TODO
----

 * Add maven goal to avoid manual call to git submodule init.
 * Make hpack-test-case update itself from git, and run new tests.
 * Add maven goal to generate stories and a pull request to hpack-test-case
   to have others validate our output.

HSPLokhttp3/EventListener;->requestBodyStart(Lokhttp3/Call;)V
HSPLokhttp3/EventListener;->requestHeadersEnd(Lokhttp3/Call;Lokhttp3/Request;)V
HSPLokhttp3/EventListener;->requestHeadersStart(Lokhttp3/Call;)V
HSPLokhttp3/EventListener;->responseBodyEnd(Lokhttp3/Call;J)V
HSPLokhttp3/EventListener;->responseBodyStart(Lokhttp3/Call;)V
HSPLokhttp3/EventListener;->responseHeadersEnd(Lokhttp3/Call;Lokhttp3/Response;)V

URLs are abstract:

 * until [nextPart] returns null. After calling [nextPart] any preceding parts should not be read.
 *
 * Typical use loops over the parts in sequence:
 *
 * ```kotlin
 * val response: Response = call.execute()
 * val multipartReader = MultipartReader(response.body!!)
 *
 * multipartReader.use {
 *   while (true) {
 *     val part = multipartReader.nextPart() ?: break
 *     process(part.headers, part.body)
 *   }

    assertThat(listener.recordedEventTypes())
      .containsExactly("CallStart", "CallStart", "CallFailed")
  }

  private fun makeSynchronousCall(call: Call): Thread {
    val thread =
      Thread {
        try {
          call.execute()
          throw AssertionError()
        } catch (expected: IOException) {
        }
      }
    thread.start()
    return thread
  }

  private var nextQueueName = 10000
  private var coordinatorWaiting = false
  private var coordinatorWakeUpAt = 0L

  /**
   * When we need a new thread to run tasks, we call [Backend.execute]. A few microseconds later we
   * expect a newly-started thread to call [Runnable.run]. We shouldn't request new threads until
   * the already-requested ones are in service, otherwise we might create more threads than we need.
   *

    server2.useHttps(handshakeCertificates.sslSocketFactory())
  }

  private fun executeSynchronously(request: Request): RecordedResponse {
    val call = client.newCall(request)
    return try {
      val response = call.execute()
      val bodyString = response.body.string()
      RecordedResponse(request, response, null, bodyString, null)
    } catch (e: IOException) {

        override fun select(uri: URI) = listOf(socksProxy.proxy())

        override fun connectFailed(
          uri: URI,
          socketAddress: SocketAddress,
          e: IOException,
        ) = error("unexpected call")
      }
    val client =
      clientTestRule.newClientBuilder()
        .proxySelector(proxySelector)
        .build()
    val request = Request.Builder().url(server.url("/")).build()

```

## EventListener events 

Cache Events are exposed via the EventListener API.  Typical scenarios are below.

### Cache Hit

In the ideal scenario the cache can fulfill the request without any conditional call to the network.
This will skip the normal events such as DNS, connecting to the network, and downloading the response body.

As recommended by the HTTP RFC the max age of a document is defaulted to 10% of the