Returns the status of a given transaction.

def get_transaction_status(self, transactionId):
        """
        Returns the status of a given transaction.
        """
        params = {}
        params['TransactionId'] = transactionId
    
        response = self.make_request("GetTransactionStatus", params)
        body = response.read()
        if(response.status == 200):
            rs = ResultSet()
            h = handler.XmlHandler(rs, self)
            xml.sax.parseString(body, h)
            return rs
        else:
            raise FPSResponseError(response.status, response.reason, body)