}

  private fun trackFailure(e: IOException) {
    hasFailure = true
    codec.carrier.trackFailure(call, e)
  }

  fun <E : IOException?> bodyComplete(
    bytesRead: Long,
    responseDone: Boolean,
    requestDone: Boolean,
    e: E,
  ): E {
    if (e != null) {
      trackFailure(e)
    }
    if (requestDone) {
      if (e != null) {

   * CONNECT tunnels. Note that CONNECT tunnels are significantly less capable than connections.
   */
  interface Carrier {
    val route: Route

    fun trackFailure(
      call: RealCall,
      e: IOException?,
    )

    fun noNewExchanges()

    fun cancel()
  }

  companion object {
    /**