def METHOD_NAME():
    graph = Graph((NODE_Y, NODE_X), links=NODES_AT_LINK, sort=True)
    assert_array_equal(
        graph.nodes_at_link, [[0, 1], [1, 2], [0, 3], [1, 4], [2, 5], [3, 4], [4, 5]]
    )
    with pytest.raises(ValueError):
        graph.nodes_at_link[0] = [1, 0]