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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 messageid_match(self, messageid):
 """Add match for log entries with specified `messageid`. `messageid` can be string of hexadicimal digits or a UUID instance. Standard message IDs can be found in systemd.id128. Equivalent to add_match(MESSAGE_ID=`messageid`). """

        if isinstance(messageid, _uuid.UUID):
            messageid = messageid.hex
        self.add_match(MESSAGE_ID=messageid)