Are there any plans to add optgroup type in the RadzenDropDown i.e.
<select>
<optgroup label="Fruits">
<option value="apple">Apple</option>
<option value="banana">Banana</option>
</optgroup>
<optgroup label="Vegetables">
<option value="carrot">Carrot</option>
<option value="lettuce">Lettuce</option>
</optgroup>
</select>