docs: public void promote() {
          URL url = VERSION_URL_TEMPLATE.build(this.getAPI().getBaseURL(), this.fileID, "current");
  
          JsonObject jsonObject = new JsonObject();
          jsonObject.add("type", "file_version");
          jsonObject.add("id", this.getID());
  
          BoxJSONRequest request = new BoxJSONRequest(this.getAPI(), url, "POST");
          request.setBody(jsonObject.toString());
          BoxJSONResponse response = (BoxJSONResponse) request.send();
          this.parseJSON(JsonObject.readFrom(response.getJSON()));
      }