how to overlay NSWindow on application in full screen mode

Question

hello everyone, I'm making an application and I need to overlay an NSWindow with debug information on top of applications opened in full screen mode. How can i do this? Here is my code -

let contentRect = NSScreen.main!.frame
let overlayWindow = NSWindow(contentRect: contentRect,
                                         styleMask: [.borderless, .fullSizeContentView],
                                         backing: .buffered,
                                         defer: false
)
overlayWindow.level = .screenSaver
                
overlayWindow.collectionBehavior = [.canJoinAllSpaces, .fullScreenAuxiliary, .stationary]
                
let size = contentRect.width/3
                
overlayWindow.setFrame(
    CGRect(
        x: contentRect.midX - size/2,
        y: contentRect.midY - size/2,
        width: size,
        height: size
        ),
        display: true
    )
                
    overlayWindow.makeKeyAndOrderFront(nil)


i tried to add .stationary to collectionBehavior