Get access to inner client from `ClientWithMiddleware`?

[milesj]

Motivations

I'm using some functions from outside of our project that require &reqwest::Client as an argument, but we're using middleware via ClientWithMiddleware, and there's no way to access the inner reqwest::Client to pass to this function.

For these functions/situations, we do not care about running the middleware, just that we are reusing the same client.

Solution

Maybe a ClientWithMiddleware.get_inner() method, or implement AsRef<Client> for ClientWithMiddleware.

Alternatives

Additional context

[miguelhrocha]

I went ahead and implemented this: #209