public int GetItemCountOfGroup (string groupId)
{
CommandBarMenu menu = GetMenu(groupId);
//need to simulate the user clicking on this in order to actually get populated.
//could just as well have called our method CreateUIForChoiceGroup() instead of the groups OnDisplay()
//method, but the latter is one step closer to reality.
((ChoiceGroup)menu.Tag).OnDisplay(null, null);
return menu.Items.Count;
}