}
	if as, ok := makeASCIISet(cutset); ok {
		return trimLeftASCII(s, &as)
	}
	return trimLeftUnicode(s, cutset)
}

func trimLeftByte(s []byte, c byte) []byte {
	for len(s) > 0 && s[0] == c {
		s = s[1:]
	}
	if len(s) == 0 {
		// This is what we've historically done.
		return nil
	}
	return s
}

func trimLeftASCII(s []byte, as *asciiSet) []byte {
	for len(s) > 0 {