비스무리하게 구현하면

DefaultLayout.swift

class DefaultLayout : Layout {
    let definitions = [
        Definition(PickButton.self, BottomButtonRepresentation.self),
        Definition(CameraView.self, FullScreenRepresentation.self),
        Definition(OverlayFlashView.self, FullScreenRepresentation.self),
    ]
}

class Definition {
    var elementType : Any?
    var representationType : Any?
    
    init (_ ele: Any, _ rep: Any) {
        if ele is UIView {
            elementType = ele
        } else {
            print("Error")
            return
        }
        
        if rep is Representation {
            representationType = rep
        } else {
            print("Error")
            return
        }
    }
}