It's not a SnackBar, just a TextView

[rumburake]

In Step 5 page: https://developer.android.com/codelabs/kotlin-coroutines#4

One second after the user clicks the main view, it requests a snackbar.

Wait one second then display a snackbar.

_snackbar.value can be called directly from main thread

These all should be updated to say "display taps in a TextView" - looks like the SnackBar is now used for errors, and updated separately.