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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def total_msg_sent(self):
 """Returns total number of UPDATE, NOTIFICATION and ROUTE_REFRESH message sent to this peer. """

        return (self.get_count(PeerCounterNames.SENT_REFRESH) +
                self.get_count(PeerCounterNames.SENT_UPDATES))