code: func (mounter *Mounter) IsLikelyNotMountPoint(file string) (bool, error) {
  	stat, err := os.Lstat(file)
  	if err != nil {
  		return true, err
  	}
  	// If current file is a symlink, then it is a mountpoint.
  	if stat.Mode()&os.ModeSymlink != 0 {
  		target, err := os.Readlink(file)
  		if err != nil {
  			return true, fmt.Errorf("readlink error: %v", err)
  		}
  		exists, err := mounter.ExistsPath(target)
  		if err != nil {
  			return true, err
  		}
  		return !exists, nil
  	}
  
  	return true, nil
  }
docs: // IsLikelyNotMountPoint determines if a directory is not a mountpoint.