val certificate: X509Certificate = heldCertificate.certificate
    val certificatePinner: CertificatePinner = CertificatePinner.Builder().build()
    val certificates: List<Certificate> = listOf()
    certificatePinner.check("", listOf(certificate))
    certificatePinner.check("", arrayOf<Certificate>(certificate, certificate).toList())
    val pin: String = CertificatePinner.pin(certificate)

 *  **OkHttp's new okhttp-tls submodule tames HTTPS and TLS.**

    `HeldCertificate` is a TLS certificate and its private key. Generate a certificate with its
    builder then use it to sign another certificate or perform a TLS handshake. The
    `certificatePem()` method encodes the certificate in the familiar PEM format
    (`--- BEGIN CERTIFICATE ---`); the `privateKeyPkcs8Pem()` does likewise for the private key.

    public void setDnsResolver(final DnsResolver dnsResolver) {
        this.dnsResolver = dnsResolver;
    }

    /**
     * Sets whether to ignore SSL certificate validation.
     *
     * @param ignoreSslCertificate True to ignore SSL certificate validation, false otherwise
     */
    public void setIgnoreSslCertificate(final boolean ignoreSslCertificate) {
        this.ignoreSslCertificate = ignoreSslCertificate;

	//	keyFile := filepath.Join(testDataDir, "server.key")
	cer, err := tls.X509KeyPair(cert, key)
	if err != nil {
		t.Fatalf("Failed to load certificate: %v", err)
	}
	config := &tls.Config{Certificates: []tls.Certificate{cer}}

	testServer := UnstartedTestServer(t, instanceType)
	testServer.Server.TLS = config
	testServer.Server.StartTLS()
	return testServer
}

        this.hostnameVerifier = hostnameVerifier
      }

    /**
     * Sets the certificate pinner that constrains which certificates are trusted. By default HTTPS
     * connections rely on only the [SSL socket factory][sslSocketFactory] to establish trust.
     * Pinning certificates avoids the need to trust certificate authorities.
     */
    fun certificatePinner(certificatePinner: CertificatePinner) =
      apply {

	public final fun check (Ljava/lang/String;[Ljava/security/cert/Certificate;)V
	public fun equals (Ljava/lang/Object;)Z
	public final fun findMatchingPins (Ljava/lang/String;)Ljava/util/List;
	public final fun getPins ()Ljava/util/Set;
	public fun hashCode ()I
	public static final fun pin (Ljava/security/cert/Certificate;)Ljava/lang/String;

streaming_max_pub_acks_in_flight  (number)    number of messages to publish without waiting for ACKs
streaming_cluster_id              (string)    unique ID for NATS streaming cluster
cert_authority                    (string)    path to certificate chain of the target NATS server
client_cert                       (string)    client cert for NATS mTLS auth
client_key                        (string)    client cert key for NATS mTLS auth

				"application/vnd.airzip.filesecure.azs",
				"application/vnd.amazon.ebook",
				"application/vnd.americandynamics.acc",
				"application/vnd.amiga.ami",
				"application/vnd.anser-web-certificate-issue-initiation",
				"application/vnd.anser-web-funds-transfer-initiation",
				"application/vnd.antix.game-component",
				"application/vnd.apple.installer+xml",
				"application/vnd.apple.iwork",

	public final fun check (Ljava/lang/String;[Ljava/security/cert/Certificate;)V
	public fun equals (Ljava/lang/Object;)Z
	public final fun findMatchingPins (Ljava/lang/String;)Ljava/util/List;
	public final fun getPins ()Ljava/util/Set;
	public fun hashCode ()I
	public static final fun pin (Ljava/security/cert/Certificate;)Ljava/lang/String;

                httpClientBuilder.setSSLContext(sslContext);
                logger.warn(
                        "SSL certificate validation is disabled. This configuration is insecure and should only be used in development/testing environments.");
                return new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE);