BarEventDecorator.java

@Decorates
class BarEventDecorator extends Event<Bar> {
    @Inject @Delegate @Cool
    Event<Bar> barEvent;

    public void fire(Bar bar) {
        // barEvent.fire(bar);
    }
}
    

Foo.java

class Foo {

   @Inject Event<Bar> e;

   void doIt() {
      e.fire(new Bar());
   }

}