def METHOD_NAME(self):
    self.insert_rows()
    # With prefetch clause
    band = (
        Band.objects()
        .get((Band.name == "Pythonistas"))
        .prefetch(Band.manager)
        .run_sync()
    )
    self.assertIsInstance(band.manager, Manager)
    # Just passing it straight into objects
    band = (
        Band.objects(Band.manager)
        .get((Band.name == "Pythonistas"))
        .run_sync()
    )
    self.assertIsInstance(band.manager, Manager)