code: def get(self, *args, **kwargs):
          
          assert not args
          assert list(kwargs.keys()) == ['pk']
          pk = kwargs['pk']
          model_name = self.model.__name__
          object_spec = (model_name, pk, None)
          instances = self.cache.get_instances((object_spec,))
          try:
              model_data = instances[(model_name, pk)][0]
          except KeyError:
              raise self.model.DoesNotExist(
                  "No match for %r with args %r, kwargs %r" %
                  (self.model, args, kwargs))
          else:
              return CachedModel(self.model, model_data)
docs: Return the single item from the filtered queryset.