Is there a way to prevent a user from removing certain items in the right list part of q:twoListSelection component?

I'd image there would be few ways to do this:

1. Disable the item in the right list so that user cannot select it.
2. Disable the remove button when user select that item
3. When user clicks the remove button return false from onclick() when that item is selected.

I don't know a way to do any of those in quipukit.

Thanks!