code: def GetOptions(self):
      
      if self._options:
        return self._options
      from google.protobuf import descriptor_pb2
      try:
        options_class = getattr(descriptor_pb2, self._options_class_name)
      except AttributeError:
        raise RuntimeError('Unknown options class name %s!' %
                           (self._options_class_name))
      self._options = options_class()
      return self._options
docs: Retrieves descriptor options.
  
      This method returns the options set or creates the default options for the
      descriptor.