class Taggable {}
class Asset extends Taggable {}
class TagDataReceivedEvent {
  private final Taggable taggable;
  public Taggable getTaggable() { return taggable; }
}

rule "f"
when
	$e: TagDataReceivedEvent(newLocation != oldLocation)
	$a: Asset() from $e.taggable
then
	System.err.println("ASF" + $a);
end