* **RealConnectionPool** manages reuse of HTTP and HTTP/2 connections for reduced latency. Every OkHttpClient has one, and its lifetime spans the lifetime of the OkHttpClient.

 * **RealConnection** is the socket and streams of an HTTP/1 or HTTP/2 connection. These are created on demand to fulfill HTTP requests. They may be reused for many HTTP request/response exchanges. Their lifetime is typically shorter than a connection pool.

      route.address.proxyAuthenticator
        .authenticate(route, fakeAuthChallengeResponse)

    return authenticatedRequest ?: proxyConnectRequest
  }

  override fun hasNext(failedConnection: RealConnection?): Boolean {
    if (deferredPlans.isNotEmpty()) {
      return true
    }

    if (nextRouteToTry != null) {
      return true
    }

    if (failedConnection != null) {

    )
    val connections: MutableList<RealConnection?> = ArrayList()
    val localClient =
      client
        .newBuilder()
        .eventListener(
          object : EventListener() {
            override fun connectionAcquired(
              call: Call,
              connection: Connection,
            ) {
              connections.add(connection as RealConnection)
            }
          },

   * successfully or all plans fail.
   */
  private val connectResults = taskRunner.backend.decorate(LinkedBlockingDeque<ConnectResult>())

  override fun find(): RealConnection {
    var firstException: IOException? = null
    try {
      while (tcpConnectsInFlight.isNotEmpty() || routePlanner.hasNext()) {
        if (routePlanner.isCanceled()) throw IOException("Canceled")

        }

        return null
      }

      HTTP_MISDIRECTED_REQUEST -> {
        // OkHttp can coalesce HTTP/2 connections even if the domain names are different. See
        // RealConnection.isEligible(). If we attempted this and the server returned HTTP 421, then
        // we can retry on a different connection.
        val requestBody = userResponse.request.body