def METHOD_NAME(self):
    pytest.importorskip("openbabel")
    fragmenter = Fragmenter(molecule=self.pc)
    assert fragmenter.open_rings is False
    assert fragmenter.opt_steps == 10_000
    default_mol_graph = MoleculeGraph.with_local_env_strategy(self.pc, OpenBabelNN())
    assert fragmenter.mol_graph == default_mol_graph
    assert fragmenter.total_unique_fragments == 8