docs: private Result sessionNotFound(String sessionId, String targetPath) {
          if (sessionLoader != null && sessionLoader.apply(sessionId)) {
              if (targetPath != null) {
                  return temporaryRedirect("./" + targetPath);
              } else {
                  return ok();
              }
  
          } else {
              return notFound("Unknown session ID: " + sessionId);
          }
      }