class_docstr: Abstract base class for protocol messages.
  
  Protocol message classes are almost always generated by the protocol
  compiler.  These generated types subclass Message and implement the methods
  shown below.
docstr: Support the pickle protocol.
docstr_tok: ["Support","the","pickle","protocol","."]
code: def __getstate__(self):
      """Support the pickle protocol."""
      return dict(serialized=self.SerializePartialToString())
  
label_desc: Use image node_id 26 for calling the Message obj's underlying member method code with example usage: obj.__getstate__() and returns: dict