docs: def loader(pattern, dimensions=None, distributed_dim='time', read_only=False):
      """
      It provide a root descriptor to be used inside a with statement. It
      automatically close the root when the with statement finish.
  
      Keyword arguments:
      root -- the root descriptor returned by the 'open' function
      """
      if dimensions:
          root = tailor(pattern, dimensions, distributed_dim, read_only=read_only)
      else:
          root, _ = open(pattern, read_only=read_only)
      yield root
      root.close()