// a byte slice.
// Unlike a [Buffer], a Reader is read-only and supports seeking.
// The zero value for Reader operates like a Reader of an empty slice.
type Reader struct {
	s        []byte
	i        int64 // current reading index
	prevRune int   // index of previous rune; or < 0
}

// Len returns the number of bytes of the unread portion of the
// slice.
func (r *Reader) Len() int {

				} else {
					entry := fileListEntry{
						name:  dir,
						file:  nil,
						isDir: true,
					}
					r.fileList = append(r.fileList, entry)
				}
			}
		}

		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)