src/Broadcast/Broadcast.php
public function previewVoiceByName($message, $to)
    {
        return $this->preview(self::MSG_TYPE_VOICE, $message, $to, self::PREVIEW_BY_NAME);
    }
public function previewVoiceByName($message, $to)
    {
        return $this->preview(self::MSG_TYPE_VOICE, $message, $to, self::PREVIEW_BY_NAME);
    }
Preview a voice message by name.

@param mixed $message message
@param $to

@return mixed