Cannot access SlotNode type in CodeGen Plugin

Hi,

I look after a CodeGen plugin, which my designer colleagues use and they have recently started investigating how to integrate Slots into their designs. 

Hence, I was looking into adding support to our plugin, but am having trouble parsing SlotNode types - as in the type is altogether not present from the plugin-typings? Is this expected, because it’s still in beta? Or have I missed to update something obvious - apologies if I have!

The Figma app is showing the type if I log it to the console, I just can’t add any code to manipulate it.

I am on v1.123.0 of the plugin typings.

Thanks,
Lachezar