Need data grid with sub grid capability

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I want to explore capabilities of data grid, having sub grids in mendix. Eg. i want to achieve functionality as in below screenshot, I have activity grid, with sub activity as sub grid along with collapsable feature. Data grid provides only inline editing and addition of row at top/bottom. But, how to add sub grid row and have this grid and sub grid structure. Any widget that could provide this out of the box capability?
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1 answers
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This is not trivial to achieve with Mendix. The standard data grid definitely does not support this.

You might want to use a list view styled with css to look like a table.

The following blog should help https://medium.com/mendix/my-story-6d96d1aeca11

-Andrej

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