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;

 	}

 }