docs: public synchronized static void destroy() {
      if (isInitialized()) {
        Map<String, ProcessEngine> engines = new HashMap<String, ProcessEngine>(processEngines);
        processEngines = new HashMap<String, ProcessEngine>();
  
        for (String processEngineName : engines.keySet()) {
          ProcessEngine processEngine = engines.get(processEngineName);
          try {
            processEngine.close();
          } catch (Exception e) {
            log.error("exception while closing {}", (processEngineName == null ? "the default process engine" : "process engine " + processEngineName), e);
          }
        }
  
        processEngineInfosByName.clear();
        processEngineInfosByResourceUrl.clear();
        processEngineInfos.clear();
  
        setInitialized(false);
      }
    }