Get JsRuntime execution output

[gufoe]

Hello, I'd like to reopen the issue #11105 of getting something useful from the script evaluation of deno_code.

So, I'd like to use deno to interpret js at runtime and get the result, for instance:

let res = runtime.execute_script("<main>", "123");
assert!(res.unwrap() == serde_json::Value::from(123))

But I cannot understand how to transform a Global into something useful.

Is there any way to achieve this?
I know there has been discussion in #11129 about the return value not always being deserializable.
Couldn't a enum be returned?
Something like this:

enum EvalResult {
  Deserializable(?)
  Other(Global<Value>)
}