docs: def get_queryset(self, **filter_kwargs):
          """
          Get the list of items for this view. This will
          call the `get_parent_object` method before doing
          anything else to ensure that a valid parent object
          is present. If a parent_object is returned it gets
          set to `self.parent_object`.
  
          If a queryset has been set then that queryset will be used.
          Otherwise the default manager for the provided
          model will be used.
  
          Once we have a queryset, the `get_filter` method
          is called and added to the queryset which is then
          returned.
          """
          self.parent_object = self.get_parent_object()
  
          if self.queryset is not None:
              queryset = self.queryset
              if hasattr(queryset, '_clone'):
                  queryset = queryset._clone()
          elif self.model is not None:
              queryset = self.model._default_manager.filter()
          else:
              raise ImproperlyConfigured(u"'%s' must define 'queryset' or 'model'"
                                         % self.__class__.__name__)
  
          q_objects = self.get_filter(**filter_kwargs)
          queryset = queryset.filter()
          for q in q_objects:
              queryset = queryset.filter(q)
  
          return queryset