code: func CompactMinFileSize(fileSize int64) FileStoreOption {
  	return func(o *FileStoreOptions) error {
  		if fileSize < 0 {
  			return fmt.Errorf("compact minimum file size value must be a positive number")
  		}
  		o.CompactMinFileSize = fileSize
  		return nil
  	}
  }
docs: // CompactMinFileSize is a FileStore option that defines the minimum file size below
  // which compaction would not occur. Specify `0` if you don't want any minimum.