code: @Override
      public Map<String, Object> getGlobals(RuntimeEngine runtime) {
          Map<String, Object> map = new HashMap<String, Object>();
          map.putAll(_rootFactory.getGlobals(runtime));
          for (RegisterableItemsFactory f : _factories) {
              map.putAll(f.getGlobals(runtime));
          }
          return map;
      }
docs: {@inheritDoc}