public static CallCredentials requirePrivacy(final CallCredentials callCredentials) {
        return new RequirePrivacyCallCredentials(callCredentials);
    }
Wraps the given call credentials in a new layer, which ensures that the credentials are only send, if the
connection guarantees privacy. If the connection doesn't do that, the call will be aborted before sending any
data.

<p>
<b>Note:</b> This method uses experimental grpc-java-API features.
</p>

@param callCredentials The call credentials to wrap.
@return The newly created call credentials.
grpc-client-spring-boot-starter/src/main/java/net/devh/boot/grpc/client/security/CallCredentialsHelper.java