CustomMerging
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Implement your own merging logic to create a TV-guide display.

The FlexGrid offers built-in cell merging based on cell content.

The built-in merging assumes you want to create merged ranges that
span either rows or columns, but not both.

This sample shows how you can overcome this limitation by implementing 
a custom version of the MergeManager class.

The sample creates a TV schedule and merges programs across weekdays
(columns) and show times (rows).
