func (o listPathOptions) encodeMarker(marker string) string {
	if o.ID == "" {
		// Mark as returning listing...
		return fmt.Sprintf("%s[minio_cache:%s,return:]", marker, markerTagVersion)
	}
	if strings.ContainsAny(o.ID, "[:,") {
		internalLogIf(context.Background(), fmt.Errorf("encodeMarker: uuid %s contained invalid characters", o.ID))
	}

			// compatibility.
			if needsMimeEncoding(v) {
				// see https://github.com/golang/go/blob/release-branch.go1.24/src/net/mail/message.go#L325
				if strings.ContainsAny(v, "\"#$%&'(),.:;<>@[]^`{|}~") {
					v = mime.BEncoding.Encode("UTF-8", v)
				} else {
					v = mime.QEncoding.Encode("UTF-8", v)
				}
			}
			w.Header()[strings.ToLower(k)] = []string{v}
			isSet = true

		s = s[i+len(sep):]
	}
}

// Contains reports whether subslice is within b.
func Contains(b, subslice []byte) bool {
	return Index(b, subslice) != -1
}

// ContainsAny reports whether any of the UTF-8-encoded code points in chars are within b.
func ContainsAny(b []byte, chars string) bool {
	return IndexAny(b, chars) >= 0
}

// ContainsRune reports whether the rune is contained in the UTF-8-encoded byte slice b.

	{[]byte("aRegExp*"), ".(|)*+?^$[]", true},
	{[]byte(dots + dots + dots), " ", false},
}

func TestContainsAny(t *testing.T) {
	for _, ct := range ContainsAnyTests {
		if ContainsAny(ct.b, ct.substr) != ct.expected {
			t.Errorf("ContainsAny(%s, %s) = %v, want %v",
				ct.b, ct.substr, !ct.expected, ct.expected)
		}
	}
}

var ContainsRuneTests = []struct {
	b        []byte
	r        rune

						switch {
						case r >= 'a' && r <= 'z':
							return r
						case r >= 'A' && r <= 'Z':
							return r
						case r >= '0' && r <= '9':
							return r
						case strings.ContainsAny(string(r), "+=-_()!@."):
							return r
						default:
							return '_'
						}
					}, file)
				}
				if baseName == "" {
					if strings.HasSuffix(file, "/xl.meta") {