Allows single instantiation of a listener listening to multiple Listenables simultaneously.
Allows single instantiation of a listener listening to multiple Listenables simultaneously.
Convenience method for Listenable.multiple.
Adds change listeners to the Listenables to invoke the supplied function immediately when a change occurs.
Adds change listeners to the Listenables to invoke the supplied function immediately when a change occurs.
Convenience method for Listenable.onChange.
Listenable can be mixed in to provide the ability for event management on an object.