A library for working with stoppables. Stoppables are similar to promises or futures. In addition, they can be stopped. This library can save add-on developers some work.

Things included

Stoppable.Stoppable: the class for the stoppable construct.
Stoppable.Stoppable.new: the constructor for the Stoppable class.
Stoppable.all: returns a new stoppable that when stopped also stops all given stoppables.

Methods:

hasBeenRequestedToStop: returns if the stoppable has been requested to stop.
isRunning: returns if the stoppable is running.
hasStopped: returns if the stoppable has stopped.
stop: requests that the stoppable stops.
alsoStop: registers another stoppable to also stop.
onStop: registers a callback that is run after "stop" has been called.
afterStop: registers a callback that is run after the stoppable has stopped.

Private methods (are returned as the second return value of the constructor):

resolve: resolves the stoppable with the given values and marks it as stopped.