the beginWidget and endWidget calls will
also be treated as tree view content, which appends to the content generated
from this data.</p>


<div class="detailHeader" id="htmlOptions-detail">
htmlOptions<span class="detailHeaderTag">
property
</span>
</div>

<div class="signature">
public array <b>$htmlOptions</b>;</div>

<p>additional HTML attributes that will be rendered in the UL tag.
The default tree view CSS has defined the following CSS classes which can be enabled
by specifying the 'class' option here