code: public ArrayList<String> dedicatedCloud_serviceName_upgradeRessource_GET(String serviceName, OvhUpgradeTypeEnum upgradeType, Long upgradedRessourceId, OvhUpgradeRessourceTypeEnum upgradedRessourceType) throws IOException {
  		String qPath = "/order/dedicatedCloud/{serviceName}/upgradeRessource";
  		StringBuilder sb = path(qPath, serviceName);
  		query(sb, "upgradeType", upgradeType);
  		query(sb, "upgradedRessourceId", upgradedRessourceId);
  		query(sb, "upgradedRessourceType", upgradedRessourceType);
  		String resp = exec(qPath, "GET", sb.toString(), null);
  		return convertTo(resp, t1);
  	}
docs: Get allowed durations for 'upgradeRessource' option
  
  REST: GET /order/dedicatedCloud/{serviceName}/upgradeRessource
  @param upgradedRessourceType [required] The type of ressource you want to upgrade.
  @param upgradedRessourceId [required] The id of a particular ressource you want to upgrade in your Private Cloud (useless for "all" UpgradeRessourceTypeEnum)
  @param upgradeType [required] The type of upgrade you want to process on the ressource(s)
  @param serviceName [required]