Set Width of Individual items

[wittd19]

I noticed one of the Showcase images (HomeLAb 3.0) has different width Items within a section..

What is the config to support this?

Also, can sub-items be expanded over multiple columns too?

• let's say the contain is set to have 3 columns (itemCountX: 3), however I want a item with subitems to take up 2 of the 3 columns, possible?