how to unregister unity ros service via ROSConnection

Unity Engine
, ,
1

I’ve created an unity service by following way

ros = ROSConnection.GetOrCreateInstance();
            ros.ImplementService<VehicleControlServiceRequest, VehicleControlServiceResponse>(unityServiceName, methodName);

When i switch the scene, i don’t know how to unregister the service to tell the client not make call any more.

Thanks for any help!