ASPxGridView - How to create collapsible columns (client-side approach)

This example demonstrates how to implement collapsible columns. I.e., some columns may be expanded without a round-trip to the server to show additional columns. The main idea is to create two columns: a data column and band column that contain other data columns and change their visibility via CSS when the expand or collapse buttons are clicked. 

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ASPxGridView - How to create collapsible columns