public static Map<String, String> getReferenceAttributes( PortletDataContext portletDataContext, StagedModel stagedModel) { StagedModelDataHandler<StagedModel> stagedModelDataHandler = _getStagedModelDataHandler(stagedModel); if (stagedModelDataHandler == null) { return Collections.emptyMap(); } return stagedModelDataHandler.getReferenceAttributes( portletDataContext, stagedModel); }