private async Task GetPrijs(PlannerSearch search)
        {
            ReisPrijs result = await PrijsLoader.LoadAsync(() => JsonCache.GetAsync(search.GetUniquePriceId(), () => _prijsService.GetPrijs(search)));

            this.Prijs = result;
        }
        private async Task GetPrijs(PlannerSearch search)
        {
            ReisPrijs result = await PrijsLoader.LoadAsync(() => _prijsService.GetPrijs(search));

            this.Prijs = result;
        }