def METHOD_NAME():
    v2_array = ak.contents.unionarray.UnionArray(
        ak.index.Index(np.array([1, 1, 0, 0, 1, 0, 1], dtype=np.int8)),
        ak.index.Index(np.array([4, 3, 0, 1, 2, 2, 4, 100])),
        [
            ak.contents.recordarray.RecordArray(
                [ak.from_iter(["1", "2", "3"], highlevel=False)], ["nest"]
            ),
            ak.contents.recordarray.RecordArray(
                [
                    ak.contents.numpyarray.NumpyArray(
                        np.array([1.1, 2.2, 3.3, 4.4, 5.5])
                    )
                ],
                ["nest"],
            ),
        ],
    )
    assert ak.validity_error(v2_array) == ""
    assert ak.validity_error(v2_array.to_typetracer()) == ""