code: def dump(file_name, predictions=None, algo=None, verbose=0):
      """A basic wrapper around Pickle to serialize a list of prediction and/or
      an algorithm on drive.
  
      What is dumped is a dictionary with keys ``'predictions'`` and ``'algo'``.
  
      Args:
          file_name(str): The name (with full path) specifying where to dump the
              predictions.
          predictions(list of :obj:`Prediction\
              <surprise.prediction_algorithms.predictions.Prediction>`): The
              predictions to dump.
          algo(:class:`Algorithm\
              <surprise.prediction_algorithms.algo_base.AlgoBase>`, optional):
              The algorithm to dump.
          verbose(int): Level of verbosity. If ``1``, then a message indicates
              that the dumping went successfully. Default is ``0``.
      """
  
      dump_obj = {"predictions": predictions, "algo": algo}
      pickle.dump(
          dump_obj,
          open(file_name, "wb"),
          protocol=pickle.HIGHEST_PROTOCOL,
      )
  
      if verbose:
          print("The dump has been saved as file", file_name)
  
label_desc: Use image node_id 1 for calling a global function with example usage: dump(file_name, predictions, algo, verbose) without return types