Workling/Starling: killing a background work from a controller

Hello!

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! Pierre