Is there a way to access sds handle selection lists though JS?

[Timo Mikkolainen]

I'm trying to create a generic function library for SDS manipulation,
starting with modifying the handle selection (e.g. selecting an edge
loop or -ring, selecting connected faces etc.). Going through all
handles and checking which ones are selected is slow and hack-ish and
I can't access the selection order. I take it that the selected
handles (with the correct order) are stored as tags in the sds object,
but I don't know how to access them through JS, any ideas?