//Method to perform reversal of preceding transfer transaction
override public void Rollback()
{
base.Rollback();
//throwing exception if transaction is not finalized
if (!Success)
{
throw new InvalidOperationException("Transfer transaction has not been completed");
}
//throwing exception if already reversed
if (_reversed)
{
throw new InvalidOperationException("Transfer transaction has been already reversed");
}
_reversed = true;
//Depositing the funds back into the _fromAccount
_withdraw.Rollback();
//Withdrawing the funds back from the _toAccount
_deposit.Rollback();
}
