code: def _CreateEventTag(self, event, comment, labels):
      
      event_identifier = event.GetIdentifier()
  
      event_tag = events.EventTag(comment=comment)
      event_tag.SetEventIdentifier(event_identifier)
      event_tag.AddLabels(labels)
  
      event_identifier_string = event_identifier.CopyToString()
      logger.debug('Created event tag: {0:s} for event: {1:s}'.format(
          comment, event_identifier_string))
  
      return event_tag
docs: Creates an event tag.
  
      Args:
        event (EventObject): event to tag.
        comment (str): event tag comment.
        labels (list[str]): event tag labels.
  
      Returns:
        EventTag: the event tag.