}
    val handshakeCertificates = builder.build()
    return clientTestRule
      .newClientBuilder()
      .sslSocketFactory(
        handshakeCertificates.sslSocketFactory(),
        handshakeCertificates.trustManager,
      ).build()
  }

  private fun buildServerSslSocketFactory(): SSLSocketFactory {
    // The test uses JDK default SSL Context instead of the Platform provided one

        // Uncomment if standard certificates are also required.
        //.addPlatformTrustedCertificates()
        .build();

    client = new OkHttpClient.Builder()
            .sslSocketFactory(certificates.sslSocketFactory(), certificates.trustManager())
            .build();
  }

  public void run() throws Exception {
    Request request = new Request.Builder()

	public final fun socketFactory (Ljavax/net/SocketFactory;)Lokhttp3/OkHttpClient$Builder;
	public final fun sslSocketFactory (Ljavax/net/ssl/SSLSocketFactory;)Lokhttp3/OkHttpClient$Builder;
	public final fun sslSocketFactory (Ljavax/net/ssl/SSLSocketFactory;Ljavax/net/ssl/X509TrustManager;)Lokhttp3/OkHttpClient$Builder;

              // noticeable memory pressure in Android apps.
//              .addPlatformTrustedCertificates()
              .build();

      builder.sslSocketFactory(certificates.sslSocketFactory(), certificates.trustManager());
    }

    OkHttpClient client = builder.build();

    sendRequest(client, "https://valid-isrgrootx1.letsencrypt.org/robots.txt");

    try {

              socket.sendBufferSize = SOCKET_BUFFER_SIZE
              socket.receiveBufferSize = SOCKET_BUFFER_SIZE
              return socket
            }
          },
        ).sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        ).eventListener(listener)
        .apply {
          if (connectionType == HTTPS) {
            protocols(listOf(HTTP_1_1))

Kotlin does have properties and we take advantage of them in OkHttp.

 * **Address**: certificatePinner, connectionSpecs, dns, hostnameVerifier, protocols, proxy,
   proxyAuthenticator, proxySelector, socketFactory, sslSocketFactory, url
 * **Cache**: directory
 * **CacheControl**: immutable, maxAgeSeconds, maxStaleSeconds, minFreshSeconds, mustRevalidate,
   noCache, noStore, noTransform, onlyIfCached, sMaxAgeSeconds

        // Uncomment if standard certificates are also required.
        // .addPlatformTrustedCertificates()
        .build()
    client =
      OkHttpClient
        .Builder()
        .sslSocketFactory(certificates.sslSocketFactory(), certificates.trustManager)
        .build()
  }

  fun run() {
    showUrl("https://squareup.com/robots.txt")
    showUrl("https://publicobject.com/helloworld.txt")
  }

    server.useHttps(handshakeCertificates.sslSocketFactory())
    server.enqueue(
      MockResponse
        .Builder()
        .body("abc")
        .build(),
    )
    val url = server.url("/")
    val connection = url.toUrl().openConnection() as HttpsURLConnection
    connection.sslSocketFactory = handshakeCertificates.sslSocketFactory()
    connection.hostnameVerifier = RecordingHostnameVerifier()

  private fun doServerHandshake(server: HandshakeCertificates): Future<Handshake> {
    return executorService.submit<Handshake> {
      serverSocket!!.accept().use { rawSocket ->
        val sslSocket =
          server.sslSocketFactory().createSocket(
            rawSocket,
            rawSocket.inetAddress.hostAddress,
            rawSocket.port,
            true,
          ) as SSLSocket
        sslSocket.use {

        this.dnsResolver = dnsResolver;
    }

    /**
     * Sets the SSL socket factory.
     * @param sslSocketFactory The SSL socket factory.
     */
    public void setSslSocketFactory(final LayeredConnectionSocketFactory sslSocketFactory) {
        this.sslSocketFactory = sslSocketFactory;
    }