public function setHotspotLabel($hotspotLabel)
    {
        if (Format::isString256($hotspotLabel) === true) {
            $this->hotspotLabel = $hotspotLabel;
        } else {
            $msg = "The 'hotspotLabel' argument must be a string value with at most 256 characters.";
            throw new InvalidArgumentException($msg);
        }
    }