cannot find FirstFragmentDirections & SecondFragmentArgs

From: https://codelabs.developers.google.com/codelabs/build-your-first-android-app/#8

AndroidStudio 3.6.2

Last tasks in the step-by-step guide are producing the following errors:

cannot find a symbol variable SecondFragmentArgs package FirstFragmentDirections does not exist cannot find symbol variable FirstFragmentDirections

Here is a sample of the code from SecondFragment.java:

public class SecondFragment extends Fragment {
    Integer myArg = SecondFragmentArgs.fromBundle(getArguments()).getMyArg();
    @Override
    public View onCreateView(
            LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState
    ) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_second, container, false);
    }

Here is the code from FirstFragment.java:

public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    view.findViewById(R.id.random_button);
    view.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            TextView showCountTextView = view.getRootView().findViewById(R.id.textview_first);
            int currentCount = Integer.parseInt(showCountTextView.getText().toString());
            FirstFragmentDirections.action_FirstFragment_to_SecondFragment action = FirstFragmentDirections.actionFirstFragmentToSecondFragment(currentCount);
            NavHostFragment.findNavController(FirstFragment.this).navigate(R.id.action_FirstFragment_to_SecondFragment);
        }
    });

    view.findViewById(R.id.toast_button).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Toast myToast = Toast.makeText(getActivity(), "Hello toast!", Toast.LENGTH_SHORT);
            myToast.show();
        }
    });

    view.findViewById(R.id.count_button).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            countMe(view);
        }
    });

}
}