/**
* Makes a ping request
* @param string $lang language of request see SupportedLanguages class
* @throws PayUException
* @return The response to the ping request sent
*/
static function doPing($lang = null)
{
$payUHttpRequestInfo = new PayUHttpRequestInfo(Environment::PAYMENTS_API, RequestMethod::POST);
return PayUApiServiceUtil::sendRequest(RequestPaymentsUtil::buildPingRequest($lang), $payUHttpRequestInfo);
}
