code: protected URI buildUrn(String... parts) {
          UrnBuilder builder = new UrnBuilder("UTF-8", "tincan", "uportal", "activities");
          builder.add(parts);
  
          return builder.getUri();
      }
docs: Build the URN for the LrsStatement. This method attaches creates the base URN. Additional
  elements can be attached.
  
  @param parts Additional URN elements.
  @return The formatted URI