def METHOD_NAME():
    content = ak.contents.NumpyArray(
        np.array([1.1, 2.2, 3.3, 4.4, 5.5, 6.6, 7.7, 8.8, 9.9])
    )
    starts = ak.index.Index64(np.array([0, 3, 3, 5, 6]))
    stops = ak.index.Index64(np.array([3, 3, 5, 6, 9]))
    layout = ak.contents.ListArray(starts, stops, content)
    packed = ak.operations.to_packed(layout, highlevel=False)
    assert to_list(packed) == to_list(layout)
    assert isinstance(packed, ak.contents.ListOffsetArray)
    assert packed.offsets[0] == 0