def test_clear(self):
        with self.assertNumQueries(5):
            with_prefetch = Author.objects.prefetch_related('books')
            without_prefetch = with_prefetch.prefetch_related(None)
            lists = [list(a.books.all()) for a in without_prefetch]
List AS numbers matching `spec`.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/tests/modeltests/prefetch_related/tests.py/PrefetchRelatedTests.test_clear--crossover with--dataset/ETHPy150Open SpriteLink/NIPAP/nipap/nipap/backend.py/Nipap.list_asn