def METHOD_NAME(self):
    cfg = Configuration.default(
        cell_types=dict(my_type=dict(spatial=dict(radius=2, density=1)))
    )
    netw = Scaffold(cfg)
    pslist = netw.get_placement_sets()
    self.assertIsInstance(pslist, list, "should get list of PS")
    self.assertEqual(1, len(pslist), "should have one PS per cell type")
    self.assertIsInstance(pslist[0], PlacementSet, "elements should be PS")