Returns true if the item at index idx is checkable in some way, i.e. if it has a checkbox or radio button.
Note: Checkable items just display a checkmark or radio button, but don't have any built-in checking behavior and must be checked/unchecked manually.
Returns true if the item at index idx is checkable in some way, i.e. if it has a checkbox or radio button. Note: Checkable items just display a checkmark or radio button, but don't have any built-in checking behavior and must be checked/unchecked manually.