code: private void addSimplifiers(List<Extractor> pHandlers, Extractor[] pSimplifyHandlers) {
          if (pSimplifyHandlers != null && pSimplifyHandlers.length > 0) {
              pHandlers.addAll(Arrays.asList(pSimplifyHandlers));
          } else {
              // Add all
              pHandlers.addAll(ServiceObjectFactory.<Extractor>createServiceObjects(SIMPLIFIERS_DEFAULT_DEF, SIMPLIFIERS_DEF));
          }
      }
docs: Simplifiers are added either explicitely or by reflection from a subpackage