You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: uuid.go
    path of file: ./repos/scan4all/vendor/github.com/gofrs/uuid
    
    the code of the file until where you have to start completion: // Copyright (C) 2013-2018 by Maxim Bublis <b@codemonkey.ru>
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of 
    
func TimestampFromV1(u UUID) (Timestamp, error) {
	if u.Version() != 1 {
		err := fmt.Errorf("uuid: %s is version %d, not version 1", u, u.Version())
		return 0, err
	}

	low := binary.BigEndian.Uint32(u[0:4])
	mid := binary.BigEndian.Uint16(u[4:6])
	hi := binary.BigEndian.Uint16(u[6:8]) & 0xfff

	return Timestamp(uint64(low) + (uint64(mid) << 32) + (uint64(hi) << 48)), nil
}