get_ppr for bipartite heterogeneous?

[bryceForrest]

Hi! Small bit of confusion. I've looked over the source code and can't tell well enough what's going on to answer my own question.
Does the edge index in get_ppr expect edges from a homogeneous or heterogeneous graph? Or does it even matter?
Everything I've seen about PPR uses user-item graphs as an example, so I want to assume it's heterogeneous.
If I have a heterogeneous bipartite edge index, node 0 in edge_index[0] is not the same as node 0 in edge_index[1] so I just want to make sure I'm using it correctly.
Thanks!