[Feature]: Support Complex Constructors?

[coogle]

Problem

I have some Repository classes that need to do some initialization beyond simply assigning properties (e.g. setting up a subscription to a stream, for example). I can't seem to figure out how to do this with cached as my class becomes a mixin which can't have a constructor.

Is there a pattern here I'm missing?

Desired Solution

I want to be able to pass in stuff and still used cached, such as a repository class that looks like the following:

class FooRepository
{
     final ApiClient client;
     late final StreamSubscription<foo> _fooSub;

     FooRepository({
           required this.client
           required Stream<foo> fooStream;
     })
     {
            _fooSub = fooStream.listen((foo f) { /* ... */ });
     }
     
     /* ... some methods that might care about `fooStream` ... */
    
    /* ... methods that use `client` that I want to be able to easily cache ... */
}

Alternatives Considered

I couldn't figure out a pattern that allowed me to do this, without creating additional messes. I just want to use Cached for some methods in the repository, which also requires some data from streams for performance reasons.

On which platorm do you expect this solution?

All