DebugOnlyModifier.swift

extension View {
    func debugOnlyModifier<T: View>(_ modifier: (Self) -> T) -> some View {
        #if DEBUG
        return modifier(self)
        #else
        return self
        #endif
    }
    
    private var colors: [Color] {
        [.blue, .yellow, .green, .red, .brown, .cyan, .gray, .indigo, .mint, .pink, .orange]
    }
    
    func debugOnlyBackground() -> some View {
        debugOnlyModifier {
            $0.background(Rectangle().foregroundColor(colors.randomElement()))
        }
    }
}