title: How to assign object's parents to QObjectList?
body: <p>I can use this code for the assign children.</p>
  <pre><code>QObjectList boxes = this-&gt;children();
  </code></pre>
  <p>But i can't use this code.</p>
  <pre><code>QObjectList boxes = ui-&gt;checkBox_2-&gt;parent();
  </code></pre>
  <p>How can i obtain parents?</p>