sort.Slice(r.fileList, func(i, j int) bool { return fileEntryLess(r.fileList[i].name, r.fileList[j].name) })
	})
}

func fileEntryLess(x, y string) bool {
	xdir, xelem, _ := split(x)
	ydir, yelem, _ := split(y)
	return xdir < ydir || xdir == ydir && xelem < yelem
}

// Open opens the named file in the ZIP archive,
// using the semantics of fs.FS.Open:
// paths are always slash separated, with no