code: def _bulk_flag(self, request, queryset, action, done_message):
          
          n_comments = 0
          for comment in queryset:
              action(request, comment)
              n_comments += 1
  
          msg = ungettext('1 comment was successfully %(action)s.',
                          '%(count)s comments were successfully %(action)s.',
                          n_comments)
          self.message_user(request, msg % {'count': n_comments, 'action': done_message(n_comments)})
docs: Flag, approve, or remove some comments from an admin action. Actually
          calls the `action` argument to perform the heavy lifting.