def test_stanPreprocessors(self):
        factory = loaders.stan(
            t.div[t.span['Hello'], t.span['world']])
        return self._preprocessorTest(factory)
Perform a map/reduce query using the current query spec
dataset/ETHPy150Open twisted/nevow/nevow/test/test_loaders.py/TestDocFactories.test_stanPreprocessors--crossover with--dataset/ETHPy150Open aparo/django-elasticsearch/django_elasticsearch/manager.py/QuerySet.map_reduce