How to use the ocpp.routing.on function in ocpp

        @on(Action.MeterValues)
        def meter_values(self):
            pass

    @on("BootNotification")
    def on_boot_notification(reason, charging_station, **kwargs):
        assert reason == 'PowerUp'
        assert charging_station == {
            'vendor_name': 'ICU Eve Mini',
            'firmware_version': "#1:3.4.0-2990#N:217H;1.0-223",
            'model': 'ICU Eve Mini',
        }

        return call_result.BootNotificationPayload(
            current_time='2018-05-29T17:37:05.495259',
            interval=350,
            status='Accepted',
        )