title: How to expand all item in a TreeSelect from Sakai PrimeVUE?
body: <p>I'm using <a href="https://www.primefaces.org/primevue/treeselect" rel="nofollow noreferrer">TreeSelect</a> from <a href="https://www.primefaces.org/sakai-vue" rel="nofollow noreferrer">Sakai PrimeVUE template</a>, I would like to keep all items expanded on open the component, but could not find this option in the documentation.</p>
  <p>My <code>TreeSelect</code> implementation:</p>
  <pre><code>&lt;TreeSelect v-model=&quot;product.category&quot; :overlayVisible=&quot;true&quot; selectionMode=&quot;single&quot;  :options=&quot;categories&quot; @change=&quot;categoryChange(product)&quot;&gt;&lt;/TreeSelect&gt;
  </code></pre>
  <p>Info from my package.json:</p>
  <pre><code>&quot;primevue&quot;: &quot;^3.11.0&quot;,
  &quot;vue&quot;: &quot;3.2.9&quot;,
  </code></pre>