How to insert an existing dashboard item to a newly created group

The following example demonstrates how to insert an existing dashboard item in a newly created group using Dashboard API.
In this example, the ASPxDashboardViewer loads an existing dashboard with the predefined layout from an XML file. 
The following steps are performed to insert the tree view filter element into a newly created group:
- The layout item corresponding to the tree view is obtained using the FindRecursive method.
- The InsertLeft method is used to insert the tree view layout item into the newly created layout group which is used to display a new dashboard item group.
- Finally, the layout item corresponding to the tree view is removed from the layout tree and added to the layout group's ChildNodes collection.