1 files changed, 30 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core/ITemplatedItemsList.cs b/Xamarin.Forms.Core/ITemplatedItemsList.cs
new file mode 100644
index 00000000..ae979d71
--- /dev/null
+++ b/Xamarin.Forms.Core/ITemplatedItemsList.cs
@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Collections;
+
+namespace Xamarin.Forms
+{
+	public interface ITemplatedItemsList<TItem> : IReadOnlyList<TItem>, INotifyCollectionChanged where TItem : BindableObject
+	{
+		event NotifyCollectionChangedEventHandler GroupedCollectionChanged;
+		event PropertyChangedEventHandler PropertyChanged;
+
+		object BindingContext { get; }
+		string Name { get; set; }
+		TItem HeaderContent { get; }
+		IEnumerable ItemsSource { get; }
+		IReadOnlyList<string> ShortNames { get; }
+
+		int GetGlobalIndexForGroup(ITemplatedItemsList<TItem> group);
+		int GetGlobalIndexOfItem(object item);
+		ITemplatedItemsList<TItem> GetGroup(int index);
+		Tuple<int, int> GetGroupAndIndexOfItem(object item);
+		Tuple<int, int> GetGroupAndIndexOfItem(object group, object item);
+		int GetGroupIndexFromGlobal(int globalIndex, out int leftOver);
+		int IndexOf(TItem item);
+		TItem UpdateContent(TItem content, int index);
+		TItem UpdateHeader(TItem content, int groupIndex);
+	}
+}