def test_page_manager(self):
        self.assertIs(type(Page.objects), PageManager)
API call:  publish a message to a topic via a POST request
dataset/ETHPy150Open torchbox/wagtail/wagtail/wagtailcore/tests/test_page_model.py/TestPageManager.test_page_manager--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/gcloud-python/gcloud/pubsub/topic.py/Topic.publish