How to use the meshzoo.helpers._refine function in meshzoo

[cos((tilt + k / 3.0) * pi), sin((tilt + k / 3.0) * pi), 0.0]
                for k in range(6)
            ],
        ]
    )

    cells_nodes = numpy.array(
        [[0, 1, 2], [0, 2, 3], [0, 3, 4], [0, 4, 5], [0, 5, 6], [0, 6, 1]]
    )

    edge_nodes, cells_edges = create_edges(cells_nodes)

    # Refine.
    args = nodes, cells_nodes, edge_nodes, cells_edges
    for _ in range(ref_steps):
        args = _refine(*args)

    return args[0], args[1]