title: Show/Hide sub-tab on QTabWidget
body: <p>Assuming I have a QTabWidget that contains 5 sub-tabs. Now I want to show/hide a sub-tab in one of 5 sub-tabs by following code</p>
  
  <pre><code>ui-&gt;twListTabs-&gt;widget(0)-&gt;hide();           // Hide first sub-tab
  </code></pre>
  
  <p>But this didn’t work for me. Do you have any solutions?</p>
  
  <p>Thanks!</p>