init {
    // Put a floor on the keep alive duration, otherwise cleanup will spin loop.
    require(keepAliveDuration > 0L) { "keepAliveDuration <= 0: $keepAliveDuration" }
  }

  fun idleConnectionCount(): Int {
    return connections.count {
      it.withLock { it.calls.isEmpty() }
    }
  }

  fun connectionCount(): Int {
    return connections.size
  }

  /**

 */
class DiskLruCache(
  fileSystem: FileSystem,
  /** Returns the directory where this cache stores its data. */
  val directory: Path,
  private val appVersion: Int,
  internal val valueCount: Int,
  /** Returns the maximum number of bytes that this cache should use to store its data. */
  maxSize: Long,
  /** Used for asynchronous journal rebuilds. */
  taskRunner: TaskRunner,

          }
        }
      }
    }

    override fun priority(
      streamId: Int,
      streamDependency: Int,
      weight: Int,
      exclusive: Boolean,
    ) {
      // TODO: honor priority.
    }

    override fun pushPromise(
      streamId: Int,
      promisedStreamId: Int,
      requestHeaders: List<Header>,
    ) {
      pushRequestLater(promisedStreamId, requestHeaders)

  internal var errorCode: ErrorCode? = null
    get() = this.withLock { field }

  /** The exception that explains [errorCode]. Null if no exception was provided. */
  internal var errorException: IOException? = null

  init {
    if (headers != null) {
      check(!isLocallyInitiated) { "locally-initiated streams shouldn't have headers yet" }
      headersQueue += headers
    } else {

     */
    fun bodyDelay(
      delay: Long,
      unit: TimeUnit,
    ) = apply {
      bodyDelayNanos = unit.toNanos(delay)
    }

    fun headersDelay(
      delay: Long,
      unit: TimeUnit,
    ) = apply {
      headersDelayNanos = unit.toNanos(delay)
    }

    /**
     * When [protocols][MockWebServer.protocols] include [HTTP_2][okhttp3.Protocol], this attaches a

   *
   * @param timeout how long to wait before giving up, in units of [unit]
   * @param unit a [TimeUnit] determining how to interpret the [timeout] parameter
   * @return the head of the request queue
   */
  @Throws(InterruptedException::class)
  fun takeRequest(
    timeout: Long,
    unit: TimeUnit,
  ): RecordedRequest? = requestQueue.poll(timeout, unit)

  /**

class ConnectPlan(
  private val taskRunner: TaskRunner,
  private val connectionPool: RealConnectionPool,
  private val readTimeoutMillis: Int,
  private val writeTimeoutMillis: Int,
  private val socketConnectTimeoutMillis: Int,
  private val socketReadTimeoutMillis: Int,
  private val pingIntervalMillis: Int,
  private val retryOnConnectionFailure: Boolean,
  private val user: ConnectionUser,
  private val routePlanner: RealRoutePlanner,

  @get:JvmName("size")
  val size: Int
    get() = namesAndValues.size / 2

  @JvmName("-deprecated_size")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "size"),
    level = DeprecationLevel.ERROR,
  )
  fun size(): Int = size

  /** Returns the field at `position`. */
  fun name(index: Int): String = commonName(index)

  @get:JvmName("protocol") val protocol: Protocol,
  /** Returns the HTTP status message. */
  @get:JvmName("message") val message: String,
  /** Returns the HTTP status code. */
  @get:JvmName("code") val code: Int,
  /**
   * Returns the TLS handshake of the connection that carried this response, or null if the
   * response was received without TLS.
   */
  @get:JvmName("handshake") val handshake: Handshake?,

    ).isEqualTo("[::2]:1003 via proxy [::1]:5678")
  }

  private fun assertRoute(
    route: Route,
    address: Address,
    proxy: Proxy,
    socketAddress: InetAddress,
    socketPort: Int,
  ) {
    assertThat(route.address).isEqualTo(address)
    assertThat(route.proxy).isEqualTo(proxy)
    assertThat(route.socketAddress.address).isEqualTo(socketAddress)