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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 DbGetInstanceNameList(self, argin):
 """ Returns the instance names found for specified server. :param argin: Server name :type: tango.DevString :return: The instance names found for specified server. :rtype: tango.DevVarStringArray """

        self._log.debug("In DbGetInstanceNameList()")
        return self.db.get_instance_name_list(argin)