protected function appendDataToURL()
    {
        $parameterString = '';
        if( is_array($this->packageOptions[ 'data' ]) && count($this->packageOptions[ 'data' ]) != 0 ) {
            $parameterString = '?'. http_build_query( $this->packageOptions[ 'data' ], null, '&' );
        }

        return $this->curlOptions[ 'URL' ] .= $parameterString;
    }