Step 8 appears to be faulty

[chemica]

Instruction:

Open the app/src/main/CheckoutActivity.kt file

Problem:

There is no such file. The location appears to be:

android/app/src/main/java/com/google/android/gms/samples/wallet/activity/CheckoutActivity.kt

Instruction:

Replace the value of token with the JWT you created previously

// TODO: Save the JWT from the backend "response"
private val token = "TOKEN"

Problem:

There is no such comment in the file, or in the equivalent file in the complete version of the app. This problem is true of several instructions in this step.

Instruction:

Set a listener for the Add to Google Wallet button

// TODO: Set an on-click listener on the "Add to Google Wallet" button
addToGoogleWalletButton = layout.addToGoogleWalletButton.

addToGoogleWalletButton.setOnClickListener {
  walletClient.savePassesJwt(token, this, addToGoogleWalletRequestCode)
}

Problem:

This is not valid code.