code: public OvhOrderUpgradeOperationAndOrder upgrade_privateCloud_serviceName_planCode_GET(String serviceName, String planCode, Long quantity) throws IOException {
  		String qPath = "/order/upgrade/privateCloud/{serviceName}/{planCode}";
  		StringBuilder sb = path(qPath, serviceName, planCode);
  		query(sb, "quantity", quantity);
  		String resp = exec(qPath, "GET", sb.toString(), null);
  		return convertTo(resp, OvhOrderUpgradeOperationAndOrder.class);
  	}
docs: Get a provisional order for the selected upgrade of your service
  
  REST: GET /order/upgrade/privateCloud/{serviceName}/{planCode}
  @param planCode [required] Plan code of the offer you want to upgrade to
  @param quantity [required] Quantity you want to upgrade to
  @param serviceName [required] The private cloud service name
  
  API beta