private async void TabLayout_TabSelected(object sender, TabLayout.TabSelectedEventArgs e)
{
switch (e.Tab.Position)
{
case 0:
items = await ItemRepo.GetLocalItemsAsync(currentUser.City);
fragmentNavigate(new BuyItemFragment(currentUser, items));
break;
case 1:
items = await ItemRepo.GetCurrentUsersItemsAsync(currentUser.Id);
fragmentNavigate(new ViewItemsFragment(currentUser, items));
break;
}
}