def set(*args)
      val = args.pop
      keys = args.flatten
      StorageFile.set(path, [*@parents, *keys], val)
    end
def set(*args)
      val = args.pop
      keys = args.flatten
      StorageFile.set(path, [*@parents, *keys], val)
    end
set(val)
 set(key, val)
 set(key1, key2, val)
 set([key], val)
 set([key1, key2], val)