if (https) {
      server.useHttps(handshakeCertificates.sslSocketFactory())
      server2.useHttps(handshakeCertificates.sslSocketFactory())
      server2.protocolNegotiationEnabled = false
      client =
        client
          .newBuilder()
          .sslSocketFactory(
            handshakeCertificates.sslSocketFactory(),
            handshakeCertificates.trustManager,

        .build()
    val handshakeCertificates =
      HandshakeCertificates
        .Builder()
        .heldCertificate(heldCertificate)
        .addTrustedCertificate(heldCertificate.certificate)
        .build()

    // Use that certificate on the server and trust it on the client.
    server.useHttps(handshakeCertificates.sslSocketFactory())
    client =
      client

        .body("ABC")
        .build(),
    )
    client =
      client
        .newBuilder()
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        ).hostnameVerifier(NULL_HOSTNAME_VERIFIER)
        .build()
    val request = Request.Builder().url(server.url("/")).build()
    val response1 = client.newCall(request).execute()