rxjava observation between start and stop

gistfile1.txt

override fun onStart() {
    super.onStart()
    disposable = viewModel.eventsFlow
            .asObservable() // converting to Rx for the example
            .subscribe {
                when (it) {
                    MainViewModel.Event.NavigateToSettings -> {}
                    is MainViewModel.Event.ShowSnackBar -> {}
                    is MainViewModel.Event.ShowToast -> {}
                }
            }
}

override fun onStop() {
    super.onStop()
    disposable?.dispose()
}