Rendering a Screen Based On Its ViewState

SomeFragment.kt

viewModel.viewState.observe(this) {
    when (it) {
        is SearchViewState.Entering -> {
            text_destination_from.text = it.from.name
            text_small_from.text = it.from.shortName
            text_destination_to.text = it.to.name
            text_small_to.text = it.to.shortName
        }
        is SearchViewState.Loaded -> {
            adapter.flights = it.flights
            adapter.notifyDataSetChanged()
        }
    }
}