docs: protected void removeWatermark(URLTemplate itemUrl) {
          URL watermarkUrl = itemUrl.build(this.getAPI().getBaseURL(), this.getID());
          URL url = WATERMARK_URL_TEMPLATE.build(watermarkUrl.toString());
          BoxAPIRequest request = new BoxAPIRequest(this.getAPI(), url, "DELETE");
          BoxAPIResponse response = request.send();
          response.disconnect();
      }