There is something I don't understand with Workling/Starling: it is
easy to start a background work from a controller, but is it possible
to stop this background work from a controller?
Say for example:
user input -> controller triggers background work aaa
another user input -> controller kills background work aaa
I know that when you call MyWorker.asynch_my_method it returns a UID,
but I don't understand how to use it to kill it?
Thanks a lot!