A naive implementation using debounce

PickupFragment.kt

override fun onStart() {
    super.onStart()
    source().viewStates()
        .debounce {
            when {
                it.isLoading() -> Observable.timer(250, TimeUnit.MILLISECONDS)
                else -> Observable.empty()
            }
        }
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe { data: PickupData ->
            adapter.setData(data)
        }
        .addTo(disposables)
}