Further, if we had modularized our application and moved the NumberFactFeature, then without a controlled dependency we would have been in quite a tough spot. In order to run the preview in an SPM module it would need the presence of the Info.plist key we just added, but SPM modules don’t have Info.plists. So it would not be possible to apply that fix in order to get our previews working, which means we would be forced to run our feature in a simulator in order to play around with this code, and that completely destroys the fast iterative cycle that Xcode previews are supposed to give us.

But, with that said, we do have a preview in place, and things are looking good. How do we now make it so that we can drill down to a NumberFactFeature from a CounterFeature?

Let’s try that out.