code: @Override
      public List<ProcessEventListener> getProcessEventListeners(RuntimeEngine runtime) {
          List<ProcessEventListener> list = new ArrayList<ProcessEventListener>();
          list.addAll(_rootFactory.getProcessEventListeners(runtime));
          for (RegisterableItemsFactory f : _factories) {
              list.addAll(f.getProcessEventListeners(runtime));
          }
          return list;
      }
docs: {@inheritDoc}