docs: protected BoxWatermark applyWatermark(URLTemplate itemUrl, String imprint) {
          URL watermarkUrl = itemUrl.build(this.getAPI().getBaseURL(), this.getID());
          URL url = WATERMARK_URL_TEMPLATE.build(watermarkUrl.toString());
          BoxJSONRequest request = new BoxJSONRequest(this.getAPI(), url, "PUT");
          JsonObject body = new JsonObject()
                  .add(BoxWatermark.WATERMARK_JSON_KEY, new JsonObject()
                          .add(BoxWatermark.WATERMARK_IMPRINT_JSON_KEY, imprint));
          request.setBody(body.toString());
          BoxJSONResponse response = (BoxJSONResponse) request.send();
          return new BoxWatermark(response.getJSON());
      }