How do I add auto-complete comment in Xcode (Swift)?

Question

How can I add text to autocomplete like below, the \"Tells the element to activate itself...\" part,

This is what I have,

But the \"This is a t

Answer 1

    /**
     Put comments just above the funcion using the Markdown format like this
    */
    func exampleFunction() {
        print("The comments above will show up in the auto complete popover.")
    }

Popover Example

Full explanation @ Hacking With Swift