title: Get all elements of a particular type of view from superView
body: <p>I have an <code>UITableView</code>. </p>
  
  <p>The <code>UITableView</code> contains </p>
  
  <ol>
  <li><code>UITextView</code> </li>
  <li><code>UICollectionView</code> </li>
  <li><code>UILabel</code> </li>
  </ol>
  
  <p>Now, I want to get all <code>UILabel</code>'s from the <code>superView</code>.</p>
  
  <p>How to do it?</p>