code: public Tree getMeta(boolean createIfNotExists) {
  		Tree root = getRoot();
  		if (root.meta == null) {
  			if (createIfNotExists) {
  				root.meta = new LinkedHashMap<String, Object>();
  			} else {
  				return null;
  			}
  		}
  		return new Tree(root, Config.META, root.meta);
  	}
docs: Returns the metadata node (or null, if it doesn't exist and the
  "createIfNotExists" parameter is false).
  
  @param createIfNotExists
  create metadata node, if it doesn't exist
  
  @return metadata node