code: public void buildIndexDispatchers(MetaClass owner, List<Dispatcher> dispatchers) {
          dispatchers.add(new IndexViewDispatcher(owner,this));
      }
docs: Adds {@link Dispatcher}s that serves the likes of {@code index.EXT}
  
  The default implementation invokes {@link #handleIndexRequest(RequestImpl, ResponseImpl, Object, MetaClass)}
  but facet implementations can improve runtime dispatch performance by testing the presence
  of index view page upfront.