def METHOD_NAME() -> None:
    cs = bis.curstate()
    assert cs is bis._STATE
    print(bis.State)
    assert isinstance(cs, bis.State)
    cs2 = bis.curstate()
    assert cs is cs2
    old_STATE = bis._STATE
    bis._STATE = None
    cs3 = bis.curstate()
    assert cs3 is bis._STATE
    assert isinstance(cs3, bis.State)
    assert cs3 is not cs2
    bis._STATE = old_STATE