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kotlinlang

Hi!
I have been trying to create a call adapter in Retrofit for suspending functions that return a sealed class type. Something like this:
```
@GET("/")
suspend fun getSomething(): MySealedClass&lt;SuccessType, ErrorType&gt;
```
On a Reddit discussion thread, Jake left some instructions on how this could be done: <https://www.reddit.com/r/androiddev/comments/c6m3yv/network_request_wrapper_extension_for_retrofit_26>

Here's the relevant part:
&gt; `suspend fun whatever(): Whatever` will ask Retrofit for a CallAdapter to handle `Call&lt;Whatever&gt;`. Knowing this, you can register a `CallAdapter.Factory` which looks for `Call&lt;YourSealedClass&lt;BodyType&gt;&gt;`, delegates to the built-in factory for `Call&lt;BodyType&gt;`, and then wraps the value in `YourSealedClass`. This will allow `suspend fun whatever(): YourSealedClass&lt;Whatever&gt;` to work–no extension needed.

I am unable to figure out how to do the delegation part. I have a call of the type `Call&lt;MySealedClass&lt;SuccessType, E&gt;&gt;`, and need to find a delegate which can adapt `Call&lt;SuccessType&gt;`. More specifically, I can not figure out how to create a Parameterized Type Token for `Call&lt;SuccessType&gt;` so that I can pass it to retrofit to find the delegated adapter for me.

I would really appreciate some help with this.