code: func GetStat(i os.FileInfo) FileStats {
  	res := FileStats{
  		Size:  i.Size(),
  		MTime: i.ModTime().Unix(),
  		CTime: i.ModTime().Unix(),
  	}
  
  	s := i.Sys().(*syscall.Stat_t)
  	if s != nil {
  		res.RealSize = s.Blocks * 512
  	}
  
  	return res
  }
docs: // GetStat provides needed subset of FileInfo plus RealSize, Atime (if any) and Ctime (if any)