title: Cannot inflate separator view into Radiogroup
body: <p>Assume a list of inflated views - <code>options = [RadioButton, RadioButton, View, RadioButton]</code> - where the View should be a separator line.</p>
  <p>When i try todo this by inflating this into my radiogroup with following code snipped, the Radiobuttons are displayed in the RadioGroup but the View i want to have as a separator does not show up.</p>
  <pre><code>options.forEachIndexed { option_index, item -&gt;
      radio_group.addView(item)
      if (option_index == indexToSelect) {
          radio_group.check(item.id)
      }
  }
  </code></pre>
  <p>I checked with the debugger if the Radiogroup contains the View and this is the case. So i am a little bit confused why it does not show</p>