diff -r 3145aadca3d2 -r 0c551e8818e0 External/Aga.Controls/Tree/ITreeModel.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/External/Aga.Controls/Tree/ITreeModel.cs	Sun May 27 15:16:19 2012 +0000
@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Collections;
+
+namespace Aga.Controls.Tree
+{
+	public interface ITreeModel
+	{
+		IEnumerable GetChildren(TreePath treePath);
+		bool IsLeaf(TreePath treePath);
+
+		event EventHandler<TreeModelEventArgs> NodesChanged; 
+		event EventHandler<TreeModelEventArgs> NodesInserted;
+		event EventHandler<TreeModelEventArgs> NodesRemoved; 
+		event EventHandler<TreePathEventArgs> StructureChanged;
+	}
+}