code: def DbGetAttributeAlias(self, argin):
          
          self._log.debug("In DbGetAttributeAlias()")
          return self.db.get_attribute_alias(argin)
docs: Get the attribute name for the given alias.
          If alias not found in database, returns an empty string.
  
          :param argin: The attribute alias name
          :type: tango.DevString
          :return: The attribute name (device/attribute)
          :rtype: tango.DevString