Random Walk document is not clear

[stupidoge]

For random walk, as document said,

g2 = dgl.heterograph({
    ('user', 'follow', 'user'): ([0, 1, 1, 2, 3], [1, 2, 3, 0, 0]),
    ('user', 'view', 'item'): ([0, 0, 1, 2, 3, 3], [0, 1, 1, 2, 2, 1]),
    ('item', 'viewed-by', 'user'): ([0, 1, 1, 2, 2, 1], [0, 0, 1, 2, 3, 3])
dgl.sampling.random_walk(
    g2, [0, 1, 2, 0], metapath=['follow', 'view', 'viewed-by'] * 2)
(tensor([[0, 1, 1, 1, 2, 2, 3],
         [1, 3, 1, 1, 2, 2, 2],
         [2, 0, 1, 1, 3, 1, 1],
         [0, 1, 1, 0, 1, 1, 3]]), tensor([0, 0, 1, 0, 0, 1, 0]))

However, the [0, 1, 2, 0] is not defined. Which 0120 it comes from? from the user? or from the item?

[stupidoge]

This is solved. The [0, 1, 2, 0] should be the id for strats nodes defined in metapath.