def METHOD_NAME(net):
    c1 = DummyController(net)
    c2 = DummyController(net, level=1)
    c3 = DummyController(net, level=2)
    pp.runpp(net, run_control=True)
    assert c1.is_converged(net)
    assert c2.is_converged(net)
    assert c3.is_converged(net)