fun <T> Observable<T>.withTimer(): Observable<T> =
    Observable.zip(this,
        Observable.timer(5000, TimeUnit.MILLISECONDS),
        BiFunction { item, _ -> item })

 model.getWishlist()
                .withTimer()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe({
                    viewDelegate.hideProgress()
                    if (it.isSuccess()) {
                        viewDelegate.showWishlist(it.responseData)
                    }
                }, {
                    it.handleError(
                        { viewDelegate.hideProgress() },
                        { viewDelegate.onNoInternetConnection() },
                        { errorMessage -> viewDelegate.onError(errorMessage) },
                        { messageId -> viewDelegate.onError(messageId) }
                    )
                })