docs: def queryset(self, request):
          """
          Exclude replies from listing since they are displayed inline as part of
          listing.
  
          For proxy models with cls apptribute limit comments to those classified
          as cls.
          """
          qs = super(CommentAdmin, self).queryset(request)
          qs = qs.filter(
              Q(user__is_staff=False) | Q(user__isnull=True),
              is_removed=False
          )
          cls = getattr(self, 'cls', None)
          if cls:
              qs = qs.filter(classifiedcomment__cls=self.cls)
          return qs.select_related('user', 'content_type')