@Test
  fun clientAuthForWants() {
    val client = buildClient(clientCert, clientIntermediateCa.certificate)
    val socketFactory = buildServerSslSocketFactory()
    server.useHttps(socketFactory)
    server.requestClientAuth()
    server.enqueue(
      MockResponse
        .Builder()
        .body("abc")
        .build(),
    )
    val call = client.newCall(Request.Builder().url(server.url("/")).build())

    .heldCertificate(serverCertificate)
    .build();
MockWebServer server = new MockWebServer();
server.useHttps(serverCertificates.sslSocketFactory(), false);
server.requestClientAuth();
server.enqueue(new MockResponse());

// Create a client certificate and a client that uses it.
HeldCertificate clientCertificate = new HeldCertificate.Builder()
    .commonName("ianmalcolm")

    val protocols: List<Protocol> = mockWebServer.protocols
    mockWebServer.useHttps(SSLSocketFactory.getDefault() as SSLSocketFactory, false)
    mockWebServer.noClientAuth()
    mockWebServer.requestClientAuth()
    mockWebServer.requireClientAuth()
    val request: RecordedRequest = mockWebServer.takeRequest()
    val nullableRequest: RecordedRequest? = mockWebServer.takeRequest(0L, TimeUnit.SECONDS)