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: Recursively compares two messages by value and structure.
docstr_tok: ["Recursively","compares","two","messages","by","value","and","structure","."]
code: def __eq__(self, other_msg):
      """Recursively compares two messages by value and structure."""
      raise NotImplementedError
  
label_desc: Use image node_id 2 for calling the Message obj's underlying member method code with example usage: obj.__eq__(other_msg) without return types