title: How to use _whyIsThisViewNotFocusable in tvOS?
body: <p>To debug the focus issues <code>_whyIsThisViewNotFocusable</code> method is available in the tvOS, But in debug in <code>shouldUpdateFocusInContext</code> with this command like this <code>po [mainView _whyIsThisViewNotFocusable]</code> or <code>po mainView _whyIsThisViewNotFocusable</code> it gives me error :</p>
  
  <pre><code>error: &lt;EXPR&gt;:1:9: error: consecutive statements on a line must be separated by ';'
  mainView _whyIsThisViewNotFocusable
  </code></pre>
  
  <p>So what is the correct use of _whyIsThisViewNotFocusable ?</p>
  
  <p>I seen this question in some stack-overflow answers but because of less reputation i can't comment in that post/answer </p>