title: How do I access copy paste functionality in NSViewController
body: <p>in macOS, I need to handle copy paste in one <code>NSViewController</code> down my responder chain. I have found references to <code>-copy:sender</code> &amp; <code>-paste:sender</code> IBAction methods in Obj-C but can't find anything in swift 2.3 I could use. Any ideas?</p>