code: INode getINode(byte[][] components) {
      readLock();
      try {
        INode inode = rootDir.getNode(components);
        if (inode == null)
          return null;
        return (INode)inode;
      } finally {
        readUnlock();
      }
    }
docs: Get {@link INode} associated with the file/directory.
  Given name components.