.build()
    val handshakeCertificates =
      HandshakeCertificates.Builder()
        .addTrustedCertificate(rootCa.certificate)
        .build()
    val client =
      clientTestRule.newClientBuilder()
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        )

    .build();
```

[`HandshakeCertificates`][handshake_certificates] keeps the certificates for a TLS handshake.
Use its [builder][handshake_certificates_builder] to define which certificates the HTTPS server
returns to its clients. The returned instance can create an `SSLSocketFactory` that implements this
policy:

```java
HandshakeCertificates serverCertificates = new HandshakeCertificates.Builder()

  fun noPreemptiveProxyAuthorization() {
    server.useHttps(handshakeCertificates.sslSocketFactory())
    server.enqueue(MockResponse(inTunnel = true))
    server.enqueue(MockResponse(body = "response body"))
    client =
      client.newBuilder()
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        )
        .proxy(server.toProxyAddress())

  private fun enableTls() {
    client =
      client.newBuilder()
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        )
        .hostnameVerifier(RecordingHostnameVerifier())
        .build()
    server.useHttps(handshakeCertificates.sslSocketFactory())
  }

  /** A request body that slowly trickles bytes, expecting to not complete. */

      .build()
  }

  private fun enableTls() {
    client =
      client.newBuilder()
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        )
        .build()
    server.useHttps(handshakeCertificates.sslSocketFactory())
  }

  private fun assumeNetwork() {
    try {
      InetAddress.getByName("www.google.com")

       */
      private val localhostHandshakeCertificatesWithRsa2048: HandshakeCertificates by lazy {
        val heldCertificate =
          HeldCertificate.Builder()
            .commonName("localhost")
            .addSubjectAlternativeName("localhost")
            .rsa2048()
            .build()
        return@lazy HandshakeCertificates.Builder()
          .heldCertificate(heldCertificate)

    // This client shares a connection pool but has a different SSL socket factory.
    val handshakeCertificates2 = HandshakeCertificates.Builder().build()
    val anotherClient =
      client.newBuilder()
        .sslSocketFactory(
          handshakeCertificates2.sslSocketFactory(),
          handshakeCertificates2.trustManager,
        )
        .build()

}

public final class okhttp3/tls/HandshakeCertificates$Builder {
	public fun <init> ()V
	public final fun addInsecureHost (Ljava/lang/String;)Lokhttp3/tls/HandshakeCertificates$Builder;
	public final fun addPlatformTrustedCertificates ()Lokhttp3/tls/HandshakeCertificates$Builder;
	public final fun addTrustedCertificate (Ljava/security/cert/X509Certificate;)Lokhttp3/tls/HandshakeCertificates$Builder;

    }
  }

  private fun enableTls() {
    client =
      client.newBuilder()
        .sslSocketFactory(
          handshakeCertificates.sslSocketFactory(),
          handshakeCertificates.trustManager,
        )
        .build()
    server.useHttps(handshakeCertificates.sslSocketFactory())
  }

  @RetryingTest(5)
  @Flaky
  fun testHeadAfterPut() {
    class ErringRequestBody : RequestBody() {

  }

  @Test @Disabled
  fun handshakeCertificates() {
    val handshakeCertificates = HandshakeCertificates.Builder().build()
    val keyManager: X509KeyManager = handshakeCertificates.keyManager()
    val trustManager: X509TrustManager = handshakeCertificates.trustManager()
  }

  @Test @Disabled
  fun handshakeCertificatesBuilder() {
    var builder: HandshakeCertificates.Builder = HandshakeCertificates.Builder()