public function _doRequest(Zend_Soap_Client_Common $client, $request, $location, $action, $version, $one_way = null)
    {
        // Perform request as is
        if ($one_way == null) {
            return call_user_func(array($client,'SoapClient::__doRequest'), $request, $location, $action, $version);
        } else {
            return call_user_func(array($client,'SoapClient::__doRequest'), $request, $location, $action, $version, $one_way);
        }
    }