MockResponse
        .Builder()
        .code(407)
        .headers(headersOf("Proxy-Authenticate", "Basic realm=\"localhost\""))
        .inTunnel()
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .inTunnel()
        .build(),
    )
    server.enqueue(
      MockResponse(body = "response body"),
    )
    client =
      client

        server.enqueue(
          MockResponse
            .Builder()
            .code(407)
            .headers(headersOf("Proxy-Authenticate", "Basic realm=\"localhost\""))
            .inTunnel()
            .build(),
        )

        overrideBadImplementation(override = override.override, testItFails = testItFails)
      }

      OverrideParam.Authenticator -> {
        server.enqueue(

    This is only relevant for duplex request bodies, because they are written concurrently when
    reading the response body.

 *  New: `MockResponse.inTunnel()` is a new `mockwebserver3` API to configure responses that are
    served while creating a proxy tunnel. This obsoletes both the `tunnelProxy` argument on