src/Broadcast/Broadcast.php
public function sendCard($message, $to = null)
    {
        return $this->send(self::MSG_TYPE_CARD, $message, $to);
    }
public function sendCard($message, $to = null)
    {
        return $this->send(self::MSG_TYPE_CARD, $message, $to);
    }
Send a card message.

@param mixed $message message
@param mixed $to

@return mixed