How to set "red-ed out" inventory slots

[mami]

So in most inventories in Factorio you can click the big X and red out several inventory slots to shrink the inventory size. How do I do this from a mod?
Also is there a more official name for "red-ing out" inventory slots?

[Klonan]

Its part of LuaInventory:
https://lua-api.factorio.com/latest/Lua ... ry.set_bar

Internally it is called 'bar'

[FuryoftheStars]

Also is there a more official name for "red-ing out" inventory slots?

Blocking or disabling inventory slots?

[mami]

thanks, haha I missed it because I assumed "bar" had something to do with the quickbar without actually reading