How to use set_internal_field of rusty v8?

After checking the process demo it seems that

set_internal_field_count

set_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

SetNativeDataProperty

SetNativeDataProperty

SetHandler(NamedPropertyHandlerConfiguration(MapGet, MapSet))

SetHandler(NamedPropertyHandlerConfiguration(MapGet, MapSet))

were used. Is it possible to do the same in rusty_v8?

GitHub

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

GitHub

The official mirror of the V8 Git repository. Contribute to v8/v8 development by creating an account on GitHub.