class FragmentA : BundleFragment() {
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        myButton.setOnClickListener {
            navigate(FragmentADirections.fragmentAToFragmentB(), REQUEST_CODE)
            // If you aren't using SafeArgs plugin, you can navigate with direction id
            navigate(R.id.fragmentAToFragmentB, REQUEST_CODE)
        }
    }
    override fun onFragmentResult(requestCode: Int, bundle: Bundle) {
        if (requestCode == REQUEST_CODE) {
            val isLoginSuccessful = bundle.getBoolean(FragmentB.IS_LOG_IN_SUCCESSFUL, false)
            ...
        }
    }
    companion object {
        const val REQUEST_CODE = 1000
    }
}