I'm using `sinon` to stub an instance of express-`Request`.  

It looks something like this:

```
let req = sinon.createStubInstance(Request);

```

My method accepts `req: Request` but my IDE complains about me using `SinonStubbedInstance<Request>` rather than `Request`.  

I've tried using `req as Request` but I still get a warning about 'may be a mistake' and that I should first cast to `unknown` and only then to `Request`. 

I actually don't need anything from this parameter so I really just want to stub it quickly and easily.