/**
* Creates a client instance and eventually sets server address.
* Also defines default client settings.
*
* @param string $url Server address
*/
public function __construct(string $url = '')
{
parent::__construct($url);
$this->options = ['output_type' => 'xml', 'verbosity' => 'pretty', 'escaping' => ['markup'], 'version' => 'xmlrpc', 'encoding' => 'utf-8'];
}