bannersDeletionSubject
            .subscribeOn(Schedulers.single())
            .observeOn(Schedulers.single())
            .onErrorReturn { errorBanner }
            .filter { it.id != errorBanner.id }
            .subscribe(
                { banner ->
                    ListingSectionItemRealm()
                        .delete {
                            equalTo("banner.id", banner.id)
                        }
                },
                { }
            )