code: public ArrayList<String> license_virtuozzo_serviceName_upgrade_GET(String serviceName, OvhOrderableVirtuozzoContainerNumberEnum containerNumber) throws IOException {
  		String qPath = "/order/license/virtuozzo/{serviceName}/upgrade";
  		StringBuilder sb = path(qPath, serviceName);
  		query(sb, "containerNumber", containerNumber);
  		String resp = exec(qPath, "GET", sb.toString(), null);
  		return convertTo(resp, t1);
  	}
docs: Get allowed durations for 'upgrade' option
  
  REST: GET /order/license/virtuozzo/{serviceName}/upgrade
  @param containerNumber [required] How much container is this license able to manage ...
  @param serviceName [required] The name of your Virtuozzo license