MultiLevel Grouping Grid for GXT

This demo here in GXT showcase shows a grid with one level of grouping.

Is there any open source solution for Multilevel grouping开发者_开发知识库 Grid on GXT ?

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For multilevel grouping you can use GXT TreeGrid.
Here is a tutorial about TreeGrid

http://zawoad.blogspot.com/2009/11/how-to-create-basic-treegrid-using.html