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 fields in the :class:`UnknownFieldSet`.
  
  This operation is recursive for nested message.
docstr_tok: ["Clears","all","fields","in","the",":","class",":","`","UnknownFieldSet","`",".","This","operation","is","recursive","for","nested","message","."]
code: def DiscardUnknownFields(self):
      """Clears all fields in the :class:`UnknownFieldSet`.
  
      This operation is recursive for nested message.
      """
      raise NotImplementedError
  
label_desc: Use image node_id 23 for calling the Message obj's underlying member method code with example usage: obj.DiscardUnknownFields() without return types