&quot;tree-view-header&quot;&gt;
          &lt;div class=&quot;icon bone-icon&quot;&gt;&lt;&#x2F;div&gt;
          &lt;div&gt;root&lt;&#x2F;div&gt;
        &lt;&#x2F;px-flex-panel&gt;
      &lt;&#x2F;px-tree-view-node&gt;
    &lt;&#x2F;px-tree-view-node&gt;
  &lt;&#x2F;px-tree-view-node&gt;

  &lt;!-- Lights --&gt;
  &lt;px-tree-view-node&gt;
    &lt;px-flex-panel orientation=&quot;horizontal&quot; class=&quot;tree-view-header&quot;&gt;
      &lt;div class=&quot;icon light-icon&quot;&gt;&lt;&#x2F;div&gt;
  