orxelm

extension NSPointerArray {
    func addObject(_ object: AnyObject?) {
        guard let strongObject = object else { return }
 
        let pointer = Unmanaged.passUnretained(strongObject).toOpaque()
        addPointer(pointer)
    }
 
    func insertObject(_ object: AnyObject?, at index: Int) {
        guard index < count, let strongObject = object else { return }