lce-presenter-attach.java

public void onAttach(View view) {
  // Remember to clean the subscription!
  repository.getDataEventStream().subscribe({ event ->
    if (event.isLoading) {
      view.showLoading(true)
    } else if (event.hasError()) {
      view.showError(event.getError())
    } else {
      view.showData(event.getData())
    } 
  })
}