docs: Future<Boolean> shutdown() {
          // Create a simple executor that will do the backgrounding for us ...
          final ExecutorService executor = Executors.newSingleThreadExecutor(new NamedThreadFactory("modeshape-repository-stop"));
          try {
              // Submit a runnable to terminate all sessions ...
              return executor.submit(() -> doShutdown(false));
          } finally {
              // Now shutdown the executor and return the future ...
              executor.shutdown();
          }
      }