Disable single DropDown items

I have the need, to disable single Dropdown items, to not allow to be selectable.
Is this actually possible?

This is not possible - you can filter the data bound to this DropDown to include only desired items.

Thanks for your answer.
Does it make sense to extend the actual implementation with this feature?

The classic html select tag supports this.

We don't have plans for such feature however we accept pull requests.

Okay, I'll give it a try!
Thanks for your time.