edge names aren't right in Parent / reverse mode in the interactive UI

[NHDaly]

Normal mode:

 "QueryEvaluator"/mod @ 5444 (↓16, ↑3431) 376B / 18.551MB
     -→ "bindings"/intr → "SimpleVector"/svec @ 13520960 (↓1531, ↑1) 12.264KB / 18.534MB

Parent:

 "SimpleVector"/svec @ 13520960 (↑1, ↓1531) 12.264KB / 18.534MB
     ←- "owner"/prop ← "QueryEvaluator"/mod @ 5444 (↑3431, ↓16) 376B / 18.551MB

[Drvi]

So the issue is that the in Edges, the names and types are only valid in the to_pos direction, not the _from_pos:

struct Edges
    type::Vector{Int8}         # index into `snapshot.meta.edge_types`
    name_index::Vector{UInt32} # index into `snapshot.strings`
    to_pos::Vector{UInt32}     # index into `snapshot.nodes` (outgoing edge)
    _from_pos::Vector{UInt32}  # index into `snapshot.nodes` (inbound edge)
end

So ways to fix this:
a) Don't print the backward pointing edge info
b) Compute the correct backward pointing edge during rendering (potentially slow)
c) Store additional version of type and name_index (I worry about memory pressure)

[NHDaly]

I think I follow, but not completely.

Would a solution be to change _from_pos to point to the edge indexes rather than the nodes?
I have to admit that this struct-of-arrays storage format is hard for me to wrap my head around 😬