Save to Google Wallet

I need to implement "Save Offer" in Google Wallet. Read the tutorial from here https://developers.google.com/wallet/objects/savetowalletnative

But the example that is attached in the tutorial doesn't work. com.google.android.gms.wallet.CreateWalletObjectsRequest

missing from google-play-services_lib and any other libraries from here https://developers.google.com/wallet/objects/libraries

Please help me to run a sample application or advice on an alternative path to solve my problem.