docs: public int exists(String pathInZooKeeper) throws Exception {
  		checkNotNull(pathInZooKeeper, "Path in ZooKeeper");
  
  		final String path = normalizePath(pathInZooKeeper);
  
  		Stat stat = client.checkExists().forPath(path);
  
  		if (stat != null) {
  			return stat.getVersion();
  		}
  
  		return -1;
  	}