CameraPresenter.kt

override fun attachView(mvpView: AR, lifecycle: Lifecycle) {
    super.attachView(mvpView, lifecycle)
    disposables.add(dispatcher.showingArView()
            .subscribeOn(scheduler)
            .subscribe({ mvpView.showArView() }, { Timber.e(it) }))

    disposables.add(dispatcher
            .showing()
            .filter{(it !is Showing.ArView)}
            .observeOn(scheduler)
            .subscribe{mvpView.hide()})
}