Problem with sample phonegap-Android push notification app

I have followed the tutorial as mentioned in this link

http://docs.apigee.com/app-services/content/tutorial-push-notifications-sample-app

I am able to register my device to FCM (GCM)

but I face an error

"client.registerDevice is not a function"

I have included all the libraries as mentioned in the sample document

I tried by changing 'client' variable value from "null" to "https://apibaas.apigee.com/apibaas" and "

http://localhost:8080"

Please some body help me out