class ObserveProperty

Use this type to observe a property and have the method be called when it changes. For example:

@ObserveProperty('foo.bar baz qux')
validate() {
  // use this.foo.bar, this.baz, and this.qux in validation
  ...
}

Note that you can observe a property path, and more than a single property can be specified in a space-delimited list or as a constant List.