uuid.go
func (uuid UUID) URN() string {
	var buf [36 + 9]byte
	copy(buf[:], "urn:uuid:")
	encodeHex(buf[9:], uuid)
	return string(buf[:])
}
func (uuid UUID) URN() string {
	var buf [36 + 9]byte
	copy(buf[:], "urn:uuid:")
	encodeHex(buf[9:], uuid)
	return string(buf[:])
}
func ( uuid UUID ) URN ( ) string { var buf [ 36 + 9 ] byte copy ( buf [ : ] , " " ) encodeHex ( buf [ 9 : ] , uuid ) return string ( buf [ : ] ) }
// URN returns the RFC 2141 URN form of uuid,
// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx,  or "" if uuid is invalid.
URN returns the RFC 2141 URN form of uuid urn : uuid : xxxxxxxx - xxxx - xxxx - xxxx - xxxxxxxxxxxx or if uuid is invalid .