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Need to provide Stacked Header rowspan support.
We are currently using the stacked headers feature of the Grid component. However, we are customizing the stacked header by setting the rowspan value to 2 within the headerCellInfo event, it does not function as expected. And the horizontal line is missing while we perform the customization. Please check this issue and update us the details ASAP.
Sample Link : https://stackblitz.com/edit/skolvy?file=index.js
Replication steps: