docs: public void createOrUpdateData(String indexName, String type, List<NutMap> list) {
          BulkRequestBuilder bulkRequest = getClient().prepareBulk();
          if (list.size() > 0) {
              for (NutMap nutMap : list) {
                  bulkRequest.add(getClient().prepareIndex(indexName, type).setId(nutMap.getString("id")).setSource(Lang.obj2map(nutMap.get("obj"))));
              }
              bulkRequest.execute().actionGet();
          }
      }