func (u Memo) MustHash() Hash {
	val, ok := u.GetHash()

	if !ok {
		panic("arm Hash is not set")
	}

	return val
}
func (u Memo) MustHash() Hash {
	val, ok := u.GetHash()

	if !ok {
		panic("arm Hash is not set")
	}

	return val
}
// MustHash retrieves the Hash value from the union,
// panicing if the value is not set.