Grouping (nested heads / rows) #26
Description
Is your feature request related to a problem? Please describe.
I observed similar functionality for ag-grid and handontable tables
Describe the solution you'd like
https://handsontable.com/docs/12.3/javascript-data-grid/column-groups/#example
https://handsontable.com/docs/12.3/javascript-data-grid/row-parent-child/#prepare-the-data-source
Here are two great examples that describe this behavior. For headers, this is a functionality similar to colspan, for strings, this is a functionality that resembles an accordion in its behavior.
Describe alternatives you've considered
https://www.ag-grid.com/angular-data-grid/grouping-group-rows/ ag-grid also have similar feature
Additional context
I'm wondering if anyone from the team of this library is currently working on the implementation of such functionality.