} finally {
        add(newCloseables, directExecutor());
      }
    }

    @Override
    public void close() {
      if (closed) {
        return;
      }
      synchronized (this) {
        if (closed) {
          return;
        }
        closed = true;
      }
      for (Map.Entry<AutoCloseable, Executor> entry : entrySet()) {

        }

        synchronized void write(final byte[] b, final int n, final SmbFile dest, final long off) {
            this.b = b;
            this.n = n;
            this.dest = dest;
            this.off = off;
            ready = false;
            notify();
        }

        @Override
        public void run() {
            synchronized (this) {
                try {

      } finally {
        add(newCloseables, directExecutor());
      }
    }

    @Override
    public void close() {
      if (closed) {
        return;
      }
      synchronized (this) {
        if (closed) {
          return;
        }
        closed = true;
      }
      for (Map.Entry<AutoCloseable, Executor> entry : entrySet()) {

    }

    /**
     * {@inheritDoc}
     * Optimized to provide better resource cleanup with caching benefits.
     *
     * @see java.lang.AutoCloseable#close()
     */
    @Override
    public synchronized void close() {
        final SmbTreeHandleImpl th = this.treeHandle;
        if (th != null) {
            this.treeHandle = null;

            // Optimization: For non-strict lifecycle, delay tree handle closure

     * @return a Map of plugins field with {@code Plugins#getKey()} as key
     * @see Plugin#getKey()
     */
    public Map<String, Plugin> getPluginsAsMap() {
        if (pluginMap == null) {
            synchronized (this) {
                if (pluginMap == null) {
                    pluginMap = ImmutableCollections.copy(plugins.stream().collect(
                            java.util.stream.Collectors.toMap(