genType for core library - like JSON and Promise

[PritishBudhiraja]

Hey,

I was trying to add @genTypes in my project and I'm encountering this issue in my project.

So it's trying to look for the *.gen.tsx file for the core libraries types.

Attaching screenshot for the same. This should have by default created the ./JSON.gen or ./Promise.gen files.

How to overcome this issue?