requestDetail.setOrderDescription("");
requestDetail.setCustom("");
requestHeader.setSetExpressCheckoutRequestDetails(requestDetail);
SetExpressCheckoutResponseType response = (SetExpressCheckoutResponseType) caller.call("SetExpressCheckout", requestHeader);
if (!response.getAck().equals(AckCodeType.Success)) {
throw new PaymentException(response.getAck().getValue().toString());
}
token = response.getToken();
}