code: def DbGetAliasAttribute(self, argin):
          
          self._log.debug("In DbGetAliasAttribute()")
          alias_name = argin[0]
          return self.db.get_alias_attribute(alias_name)
docs: Get the attribute name from the given alias.
          If the given alias is not found in database, returns an empty string
  
          :param argin: The attribute alias
          :type: tango.DevString
          :return: The attribute name (dev_name/att_name)
          :rtype: tango.DevString