ViewV2.java

@Override public Observable showDeleteFailedWithRetry() {
    Snackbar snackbar = Snackbar.make(rootView, "Can't delete chat", Snackbar.LENGTH_LONG);
    Observable<Integer> observable = RxSnackbar.actionClicked(snackbar, "Retry"));
    Observable<Integer> dismissObservable = RxSnackbar.dismisses(snackbar)
              .filter(event -> event != Snackbar.Callback.DISMISS_EVENT_ACTION)
              .flatMap(ignored -> Observable.error(new Throwable()));
    snackbar.show();
    return observable.mergeWith(dismissObservable);
}