public function fetchInbound($inboundId)
    {
        $eiid = rawurlencode($inboundId);

        if (empty($eiid)) {
            throw new \InvalidArgumentException("Empty inbound ID given");
        }

        $result = $this->_get($this->_url("/inbounds/$eiid"));
        return Deserialize::moSms($result);
    }