CartTransform Expand Operation, want to have the items hidden by default in checkout.

[BlazarusTech]

So the expandOperation functions perfectly, but the default state in checkout for the collapsible content is to have the items expanded, which I want to keep hidden so only if users want they can click the show products to see the expanded items...

This is what it looks by default (expanded and shows "Hide n Product(s)"):

I want it to show as below by default (Collapsed - "Show n Product(s)").

Hope it's clear.