def get_queryset(self, extra_filters=None):
        try:
            return self.instance._prefetched_objects_cache[self.prefetch_cache_name]
        except (__HOLE__, KeyError):
            kwargs = extra_filters if extra_filters else {}
            return self.through.tags_for(self.model, self.instance, **kwargs)
dataset/ETHPy150Open alex/django-taggit/taggit/managers.py/_TaggableManager.get_queryset