Get Tango classes/device list embedded in a specific device server

        :param argin: Device server process name
        :type: tango.DevString
        :return: Str[0] = Device name
        Str[1] = Tango class
        Str[n] = Device name
        Str[n + 1] = Tango class
        :rtype: tango.DevVarStringArray

def DbGetDeviceClassList(self, argin):
        """ Get Tango classes/device list embedded in a specific device server

        :param argin: Device server process name
        :type: tango.DevString
        :return: Str[0] = Device name
        Str[1] = Tango class
        Str[n] = Device name
        Str[n + 1] = Tango class
        :rtype: tango.DevVarStringArray """
        self._log.debug("In DbGetDeviceClassList()")
        return self.db.get_device_class_list(argin)