public function removeAllProperties()
    {
        //build URI to merge Docs
        $strURI = Product::$baseProductUri . '/cells/' . $this->getFileName() . '/documentProperties';
        //sign URI
        $signedURI = Utils::sign($strURI);
        $responseStream = Utils::processCommand($signedURI, 'DELETE');
        $json = json_decode($responseStream);
        if (is_object($json)) {
            if ($json->Code == 200)
                return true;
            else
                return false;
        }
        return true;

    }