docs: protected BoxWatermark getWatermark(URLTemplate itemUrl, String... fields) {
          URL watermarkUrl = itemUrl.build(this.getAPI().getBaseURL(), this.getID());
          QueryStringBuilder builder = new QueryStringBuilder();
          if (fields.length > 0) {
              builder.appendParam("fields", fields);
          }
          URL url = WATERMARK_URL_TEMPLATE.buildWithQuery(watermarkUrl.toString(), builder.toString());
          BoxAPIRequest request = new BoxAPIRequest(this.getAPI(), url, "GET");
          BoxJSONResponse response = (BoxJSONResponse) request.send();
          return new BoxWatermark(response.getJSON());
      }