exp/cpp/export/uuid.go
func NewXor64Source(seed int64) *Xor64Source {
	var s Xor64Source
	s.Seed(seed)
	return &s
}
func NewXor64Source(seed int64) *Xor64Source {
	var s Xor64Source
	s.Seed(seed)
	return &s
}
// NewXor64Source returns a pointer to a new Xor64Source seeded with the given
// value.