title: print not working in Swift 3 extensions
body: <p>I'm new at Swift 3 and I try to make a <code>print("Test")</code> in a Widget extension. </p>
  
  <p>I tried the same code in <strong>ViewController.swift</strong> and It works ok. I don't know why it works there but it doesn't on <strong>TodayViewController.swift</strong>. I can't access to <code>objects</code> too.</p>
  
  <pre><code>func loadData() {
      let query = PFQuery(className: "Noticias")
      query.whereKey("titulo", equalTo:"Es Navidad")
      query.findObjectsInBackground(block: { (objects : [PFObject]?, error: Error?) -&gt; Void in
          if error == nil {
              // The find succeeded.
              print("Successfully retrieved \(objects!.count) scores.")
  
              // Do something with the found objects
              if let objects = objects {
                  for object in objects {
                      print(object.objectId!)
                  }
              }
          } else {
              // Log details of the failure
              print("bad day homie")
              print(error!)
          }
      })
  }
  </code></pre>
  
  <p>I attach I picture to see it clearly. If I try to print on the file marked as Work, it works. But if I try it on the file marked ad NO, it doesn't.<a href="https://i.stack.imgur.com/eMFxP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eMFxP.png" alt="enter image description here"></a></p>