docs: private void updateEntity(String type, String id, XContentBuilder source) throws StorageException {
          try {
              String doc = source.string();
              /* JestResult response = */esClient.execute(new Index.Builder(doc)
                      .setParameter(Parameters.OP_TYPE, "index").index(getIndexName()).type(type).id(id).build()); //$NON-NLS-1$
          } catch (Exception e) {
              throw new StorageException(e);
          }
      }