В чем разница между & amp; и & amp; & amp; в Java?

Для Swift 3

textView.delegate = self

extension MyTextView: UITextViewDelegate 

    func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange) -> Bool {

        GCITracking.sharedInstance.track(externalLink: URL)
        return true
    }
}

или если цель равна> = IOS 10

func textView(_ textView: UITextView, shouldInteractWith URL: URL, in characterRange: NSRange, interaction: UITextItemInteraction) -> Bool