var person = new WatchableObject();
person.watch(function () {
  
});
person.set("name", "Liam Neeson"); // triggers listener

WatchableObject(properties)

initial properties

get(keypath)

keypath to the value

set(keypath, value)

sets a value on the object

watcher watch(listener)

watch for any changes on the object

watcher.dispose()

disposes a watcher