made LayeredPredicate a subclass of Predicate
made LayeredPredicate a subclass of Predicate

babelsberg/babelsberg-js,psieg/babelsberg-js,fniephaus/babelsberg-js,babelsberg/babelsberg-js,babelsberg/babelsberg-js,fniephaus/babelsberg-js,babelsberg/babelsberg-js,fniephaus/babelsberg-js,psieg/babelsberg-js,fniephaus/babelsberg-js,psieg/babelsberg-js,psieg/babelsberg-js