ontent within a tree node, should be placed directly inside a  <code class="qm-code-highlight-code qm-code-font">hx-tree-node</code>  that doesn&#39;t include  <code class="qm-code-highlight-code qm-code-font">hx-tree-node-parent</code>  or  <code class="qm-code-highlight-code qm-code-font">hx-tree-node-children</code>  . </div></div></div></div></div><div class="qm-api-item qm-api-class qm-api-collapsible"><div class="qm-api-collapsible-heading"><div class="qm-api-collapsible-toggle"><i class="qm-api-chevr