private async void GetData()
        {
            IBillsRepository repository = BillsRepository.Instance;

            try {
                var list = await repository.GetProjektyAktowPrawnychList();

                newestList.Adapter = new ProjektyAktowPrawnychAdapter(this, list);

                if (viewSwitcher.CurrentView != newestList)
                {
                    viewSwitcher.ShowPrevious();
                }
            } catch (ApiRequestException ex) {
                this.ShowErrorDialog(ex.Message);
            }
        }