I have the following field:

 ListboxField::create('ArrayValues', 'ArrayValues:')->setMultiple(true)->setSource($formatted_data)->addExtraClass

in the $formatted_data variable I stored the values I want to disable. The problem is when i want to select from my dropdown I want to see
those disabled values.

After doing some research with the browser's inspector, I noticed that there is a select that it's actually hidden, and the <option> tags inside have
the correct disabled attribute AND SilverStripe actually displays those whithin an ul and somehow this ul in linked with the select.

Anyway, does anyone know what I can do to still be able to see those disabled values ?