How to use set_internal_field of rusty v8?

After checking the process demo it seems that set_internal_field_countset_internal_field_count was called, but no actual value was set.

So I'm wondering
1. is it possible to use this feature in rusty_v8?
2. In the cpp example SetNativeDataPropertySetNativeDataProperty & SetHandler(NamedPropertyHandlerConfiguration(MapGet, MapSet))SetHandler(NamedPropertyHandlerConfiguration(MapGet, MapSet)) were used. Is it possible to do the same in rusty_v8?

GitHub

rusty_v8/examples/process.rs at main · denoland/rusty_v8

Rust bindings for the V8 JavaScript engine. Contribute to denoland/rusty_v8 development by creating an account on GitHub.