public function createBioVoiceRegistration($recipient, $language = null, $webHook = null)
    {
        $bioVoiceRegistration = $this->createEmptyBioVoiceRegistration();
        $bioVoiceRegistration->setRecipient($recipient);

        if ($language !== null) {
            $bioVoiceRegistration->setLanguage($language);
        }

        if ($webHook !== null) {
            $bioVoiceRegistration->setWebHook($webHook);
        }

        return $bioVoiceRegistration;
    }