internal/unicode/cesu8/cesu8.go
func StringSize(s string) int {
	n := 0
	for _, r := range s {
		n += RuneLen(r)
	}
	return n
}
func StringSize(s string) int {
	n := 0
	for _, r := range s {
		n += RuneLen(r)
	}
	return n
}
// StringSize is like Size with a string as parameter.