Revisiting this because I previously could not understand this AddIndex()-stuff.
(I used my work-around as described to achieve what I needed to)
I still cannot make any sense from this at all.
I now want to add a key to each row so that I can identify the specific entry when selected/clicked
with the real data in another container using this key.
I can find no way to add/associate a row-level key !?!?
no straightforward, intuitive way