I have a Telerik RadComboBox that is programmatically generated in C#. In the aspx file, I have this JavaScript function which I would like to deselect any disabled comboBox item.

        function OnClientCheckAllChecked(sender, args) {

            var checkedItems = sender.get_checkedItems();

            for (var i = 0; i < checkedItems.length; i++) {

                console.log(checkedItems[i].get_text());

                if (checkedItems[i].get_enabled() === false) {

                    console.log("enabled is false for " + i);
                    checkedItems[i].set_checked(false);
                }
                
                console.log("checked is " + checkedItems[i].get_checked());
            }
        }

However, it does not work as intended. The disabled item is still checked after clicking the "Check All".

Here is an image of the description: