docstr: Returns a bytes object for the state dict.
docstr_tok: ["Returns","a","bytes","object","for","the","state","dict","."]
code: def get_state_stream(self):
      """Returns a bytes object for the state dict."""
      state_dict = self.get_state_dict()
      state_stream = ModelIO._state_dict2stream(state_dict)
      return state_stream
  
file_path: BigDL/python/orca/src/bigdl/orca/learn/pytorch/core/modelIO.py
imports: import os
  import io
  import shutil
  import tempfile
  from abc import ABCMeta, abstractmethod
  import torch
  from bigdl.dllib.utils.log4Error import invalidInputError
label_desc: Use image node_id 5 for calling the ModelIO obj's underlying member method code with example usage: obj.get_state_stream() and returns: state_stream