private void OnItemPropertyChanged(object sender, PropertyChangedEventArgs e)
{
var vm = sender.As <T>();
if (e.PropertyName == nameof(vm.IsSelected))
{
if (vm.IsSelected)
{
_itemPicked?.Invoke(sender, EArg <T> .NewArg(vm));
}
else
{
_itemUnpicked?.Invoke(sender, EArg <T> .NewArg(vm));
}
}
}
