title: “NSURL” is not implicitly convertible to “URL”; did you mean to use “as” to explicitly convert? in swift 3
body: <p><img src="https://i.stack.imgur.com/AdMY8.png" alt="Error"></p>
  
  <pre><code>func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -&gt; Bool
  {
      return FBSDKApplicationDelegate.sharedInstance().application(application, openURL: url, sourceApplication: sourceApplication, annotation: annotation)
  }
  </code></pre>