docs: public static NodeCache startAppIdWatcher(Environment env) {
      try {
        CuratorFramework curator = env.getSharedResources().getCurator();
  
        byte[] uuidBytes = curator.getData().forPath(ZookeeperPath.CONFIG_FLUO_APPLICATION_ID);
        if (uuidBytes == null) {
          Halt.halt("Fluo Application UUID not found");
          throw new RuntimeException(); // make findbugs happy
        }
  
        final String uuid = new String(uuidBytes, StandardCharsets.UTF_8);
  
        final NodeCache nodeCache = new NodeCache(curator, ZookeeperPath.CONFIG_FLUO_APPLICATION_ID);
        nodeCache.getListenable().addListener(() -> {
          ChildData node = nodeCache.getCurrentData();
          if (node == null || !uuid.equals(new String(node.getData(), StandardCharsets.UTF_8))) {
            Halt.halt("Fluo Application UUID has changed or disappeared");
          }
        });
        nodeCache.start();
        return nodeCache;
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
    }