Previous setup of Activity and ViewModel

Previous Activity.kt

class TabSwitcherActivity : Activity(), CoroutineScope by MainScope() {

  override fun onNewTabRequested() {
      launch { viewModel.onNewTabRequested() }
  }
  
}

Previous ViewModel.kt

class TabSwitcherViewModel(private val tabRepository: TabRepository) : ViewModel() {
    
  suspend fun onNewTabRequested() {
      tabRepository.add() // this is a `suspend` function    
  }

}