Learning_GTK4_tree/testsuite/gtk/ui/celllayout4.ui

<!-- test invalid cell layout attribute -->
<interface>
  <object class="GtkIconView">
    <child>
      <object class="GtkCellRendererText">
      </object>
      <attributes>
        <warbl/>
      </attributes>
    </child>
  </object>
</interface>