func (u StellarMessage) MustTxSet() TransactionSet {
	val, ok := u.GetTxSet()

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

	return val
}
func (u StellarMessage) MustTxSet() TransactionSet {
	val, ok := u.GetTxSet()

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

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