def METHOD_NAME():
    buff = io.BytesIO(b"#ASDF 1.0.0\n")
    buff.seek(0)
    with asdf.open(buff) as ff:
        assert ff.tree == {}
        assert len(ff._blocks) == 0
    buff = io.BytesIO(b"#ASDF 1.0.0\n#ASDF_STANDARD 1.0.0")
    buff.seek(0)
    with asdf.open(buff) as ff:
        assert ff.tree == {}
        assert len(ff._blocks) == 0