docs: public void unregisterAll() {
          for(Map.Entry<ZKMBeanInfo,String> e: mapBean2Path.entrySet()) {
              try {
                  unregister(e.getValue(), e.getKey());
              } catch (JMException e1) {
                  LOG.warn("Error during unregister", e1);
              }
          }
          mapBean2Path.clear();
          mapName2Bean.clear();
      }