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: Clears all data that was set in the message.
docstr_tok: ["Clears","all","data","that","was","set","in","the","message","."]
code: def Clear(self):
      """Clears all data that was set in the message."""
      raise NotImplementedError
  
label_desc: Use image node_id 9 for calling the Message obj's underlying member method code with example usage: obj.Clear() without return types