code: void showFilesConfiguration() {
  
          // Message to communicate the resolved configuration:
          String message;
          if (filesUrl != null) {
              String reload = filesReloadable ? "reloadable" : "non-reloadable";
              message = "Files will be served from: " + filesUrl + " (" + reload + ")";
          } else {
              message = "No static files will be served.";
          }
          log.info("Files: {}", message);
      }
docs: Prints out a message confirming the static file serving configuration.