public BoletasViewModel()
{
Title = "Browse";
Boletas = new ObservableCollection <Boleta>();
LoadItemsCommand = new Command(async() => await ExecuteLoadItemsCommand());
MessagingCenter.Subscribe <NewItemPage, Boleta>(this, "AddItem", async(obj, item) =>
{
var _item = item as Boleta;
Boletas.Add(_item);
await DataStore.AddBoletaAsync(_item);
});
}
