public function device()
    {
        if (is_null($this->device)) {
            $this->device = new Device($this->accessToken);
        }

        return $this->device;
    }
public function device()
    {
        if (is_null($this->device)) {
            $this->device = new Device($this->accessToken);
        }

        return $this->device;
    }
Return the device instance.

@return \EasyWeChat\ShakeAround\Device