docs: def get_serializer_class(self):
          """gets the class type of the serializer
  
          :return: `rest_framework.Serializer`
          """
          klass = None
  
          lookup_url_kwarg = self.lookup_url_kwarg or self.lookup_field
          if lookup_url_kwarg in self.kwargs:
              # Looks like this is a detail...
              klass = self.get_object().__class__
          elif "doctype" in self.request.REQUEST:
              base = self.model.get_base_class()
              doctypes = indexable_registry.families[base]
              try:
                  klass = doctypes[self.request.REQUEST["doctype"]]
              except KeyError:
                  raise Http404
  
          if hasattr(klass, "get_serializer_class"):
              return klass.get_serializer_class()
  
          # TODO: fix deprecation warning here -- `get_serializer_class` is going away soon!
          return super(ContentViewSet, self).get_serializer_class()