The symbol chooser is now owned by DocumentView instead of DocumentController.
The symbol chooser does not know about its owner and is not an observer of any notifications. Instead it has a property for “document” and one for “selectionString”. It is the owners job to update these properties (i.e. when switching document or changing the selection).
We now explicitly disable it for targets that hasn’t yet been upgraded to ARC. This way, it’s easier to get an overview of which targets hasn’t yet been upgraded and ensures new targets has ARC enabled.
