Is it feasible to nest an XLabs RepeaterView inside a RepeaterView?

I would like to achieve the above. At present and can use the RepeaterView in XAML just fine, it's an excellent addition, thank you XLabs.

Now I would like to nest another RepeaterView within the ItemTemplate of the outer RepeaterView. However when I do so All I see are the items from the innermost Repeater.

Here is my code-behind and data

    public partial class TestPage : ContentPage
    {
        public TestPage()
        {
            InitializeComponent();
            BindingContext = CreateContext();
        }
        private ObservableCollection<RootItem> CreateContext()
        {
            ObservableCollection<RootItem> result = new ObservableCollection<RootItem>();
            for (int i = 0; i < 10; i++)
            {
                RootItem rootItem = new RootItem() { Text = string.Format("Root Item {0}", i) };
                for (int m = 0; m < 5; m++)
                {
                    rootItem.ChildItems.Add(new ChildItem(rootItem) { Text = string.Format("ChildItem {0}.{1}", i, m) });
                }
                result.Add(rootItem);
            }
            return result;
        }
    }
    public class RootItem
    {
        public RootItem()
        {
            ChildItems = new List<ChildItem>();
        }
        public string Text { get; set; }
        public virtual IList<ChildItem> ChildItems { get; private set; }
    }
    public class ChildItem
    {
        public ChildItem(RootItem rootItem)
        {
            RootItem = rootItem;
        }
        public RootItem RootItem { get; private set; }
        public string Text { get; set; }
    }

Here is my XAML (I have omitted the local namespaces)

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:controls="clr-namespace:XLabs.Forms.Controls;assembly=XLabs.Forms">
  <ScrollView>
    <Label Text="Sample List" FontSize="Large"/>
    <!-- Display each RootItem -->
    <controls:RepeaterView x:TypeArguments="m:RootItem" ItemsSource="{Binding}">
      <controls:RepeaterView.ItemTemplate>
        <DataTemplate>
          <ViewCell>
            <Label Text="{Binding Text}"/>
            <!-- Display the ChildItems of the current RootItem -->
            <controls:RepeaterView x:TypeArguments="m:ChildItem" ItemsSource="{Binding ChildItems}">
              <controls:RepeaterView.ItemTemplate>
                <DataTemplate>
                  <ViewCell>
                    <Label Text="{Binding Text}" HorizontalOptions="End"/>
                  </ViewCell>
                </DataTemplate>
              </controls:RepeaterView.ItemTemplate>
            </controls:RepeaterView>
          </ViewCell>
        </DataTemplate>
      </controls:RepeaterView.ItemTemplate>
    </controls:RepeaterView>
  </ScrollView>
</ContentPage>

Can anyone help please?

Many thanks