By default, the FlexGrid applies merging to cells based on their content. In some cases, you may want to use different strategies for merging.
You can achieve this by defining a class that extends the wijmo.grid.MergeManager class and assigning an object of that type to the grid's mergeManager property.
This example illustrates by creating a grid that looks like a TV guide:
Notice how the custom merge manager creates merged ranges that span both rows and columns. This is something the default merge manager does not do.