parameters: (self)
docstring: Clears all fields in the :class:`UnknownFieldSet`.
  
      This operation is recursive for nested message.
docstring_summary: Clears all fields in the :class:`UnknownFieldSet`.
docstring_tokens: Clears all fields in the : class : UnknownFieldSet .
function: def DiscardUnknownFields(self):
      """Clears all fields in the :class:`UnknownFieldSet`.
  
      This operation is recursive for nested message.
      """
      raise NotImplementedError
function_tokens: def DiscardUnknownFields ( self ) : raise NotImplementedError