In some cases for shared headers in downloader XPC Service or generate_appcast / sign_update tools, I had to do a little dance for using double quote imports.
This allows us to remove SPUUserDriverUIComponent and remove a bunch of logic in the user driver regarding termination. The user drivers generally don't need to know about the application bundle anymore, and strictly now only show UI events.
This has another advantage of the agent being able to quit multiple instances of an application even if the application to update is sandboxed.
We enforce the logic that an application can only be relaunched if it was running initially.
Zorg