gistfile1.txt

import Foundation

func waitAroundThenReturn(continuation: @escaping ()->Void) {
    DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
        continuation()
    }
}

print("Hello, World!")
let curr = CFRunLoopGetCurrent()
waitAroundThenReturn {
    print("I waited")
    CFRunLoopStop(curr)
}
CFRunLoopRun();

print("Now I'm done")