def METHOD_NAME():
    src = np.asarray([[0, 1], [1, 1], [2, 1], [3, 1], [4, 1]], dtype=int)
    pairs = np.asarray([[1, 1], [3, 1], [1, 2], [5, 1]], dtype=int)
    out = np.empty(len(pairs), dtype=bool)
    rtn = pair_isin(src, pairs, out=out)
    assert rtn is out
    assert np.all(out == [True, True, True, False])