// from being reused. Otherwise we're still obligated to transmit the request body to
            // leave the connection in a consistent state.
            exchange.noNewExchangesOnConnection()
          }
        }
      } else if (!isUpgradeRequest) {
        exchange.noRequestBody()
      }

      if (requestBody == null || !requestBody.isDuplex()) {
        exchange.finishRequest()

        ******@****.***()
      }

      override val sink = RequestBodySink(codec.socket.sink, -1L)
      override val source = ResponseBodySource(codec.socket.source, -1L)
    }
  }

  fun noNewExchangesOnConnection() {
    codec.carrier.noNewExchanges()
  }

  fun cancel() {
    codec.cancel()
  }

  /**
   * Revoke this exchange's access to streams. This is necessary when a follow-up request is