// upper case, giving priority to the special casing rules.
func ToUpperSpecial(c unicode.SpecialCase, s []byte) []byte {
	return Map(c.ToUpper, s)
}

// ToLowerSpecial treats s as UTF-8-encoded bytes and returns a copy with all the Unicode letters mapped to their
// lower case, giving priority to the special casing rules.
func ToLowerSpecial(c unicode.SpecialCase, s []byte) []byte {
	return Map(c.ToLower, s)
}

pkg bytes, func ToLower([]uint8) []uint8
pkg bytes, func ToLowerSpecial(unicode.SpecialCase, []uint8) []uint8
pkg bytes, func ToTitle([]uint8) []uint8
pkg bytes, func ToTitleSpecial(unicode.SpecialCase, []uint8) []uint8
pkg bytes, func ToUpper([]uint8) []uint8
pkg bytes, func ToUpperSpecial(unicode.SpecialCase, []uint8) []uint8
pkg bytes, func Trim([]uint8, string) []uint8