build/transaction.go
func (m Sequence) MutateTransaction(o *TransactionBuilder) error {
	o.TX.SeqNum = xdr.SequenceNumber(m.Sequence)
	return nil
}
func (m Sequence) MutateTransaction(o *TransactionBuilder) error {
	o.TX.SeqNum = xdr.SequenceNumber(m.Sequence)
	return nil
}
// MutateTransaction for Sequence sets the SeqNum on the transaction.