func ExampleToLower() {
	fmt.Printf("%s", bytes.ToLower([]byte("Gopher")))
	// Output: gopher
}

func ExampleToLowerSpecial() {
	str := []byte("AHOJ VÝVOJÁRİ GOLANG")
	totitle := bytes.ToLowerSpecial(unicode.AzeriCase, str)
	fmt.Println("Original : " + string(str))
	fmt.Println("ToLower : " + string(totitle))
	// Output:
	// Original : AHOJ VÝVOJÁRİ GOLANG
	// ToLower : ahoj vývojári golang
}

			c := s[i]
			if 'a' <= c && c <= 'z' {
				c -= 'a' - 'A'
			}
			b[i] = c
		}
		return b
	}
	return Map(unicode.ToUpper, s)
}

// ToLower returns a copy of the byte slice s with all Unicode letters mapped to
// their lower case.
func ToLower(s []byte) []byte {
	isASCII, hasUpper := true, false
	for i := 0; i < len(s); i++ {
		c := s[i]
		if c >= utf8.RuneSelf {
			isASCII = false
			break
		}