I'm using Mardoxx's decompiled source files to make a UI mod.

I understand how GameDelegate.call() works, but the specific call "ReuqestItemCardUpdate" is confusing me. How does it know which item info to grab? What variable does it check in the UI?

I found a https://github.com/schlangster/skyui/blob/master/src/ItemMenus/ItemcardDataExtender.as in SkyUI that references the variable _selectedIndex, but that's in CoreList.as and ScrollingList.as and those aren't part of the inventory menus. What's up with that? What variable does it actually reference?

are you sure it's not a local function? or added through a custom script that's been imported?

Yes. It's a callback function, so it actually defined somewhere in the game code, and not in scaleform.