Attempting to use Dependency injection

Hi, I have a class called Box that I use in production. The initializer takes in no arguments. However for some SwiftUI previews / test cases I would like that class to be initialized with some values. I don't want that initializer (with values) to be available in production, it would be only used in SwiftUI previews and test cases. My attempt: I used #if DEBUG it solves my problem with minimal code change but not sure if I was missing a better way. Given below is a simplified example. @O...