Multiple Subgrids under a single parent

We would like to generate multiple subgrids (in this case, two) under a single parent in the TreeGrid.
Is it possible?

Please see the attached image of how it might look.

  1. The first subgrid has titles (Button, Issue #, Due By, Pass Criteria Test)

  2. The second subgrid has titles (Button, Issue #, Assigned To)

Unfortunately such feature is not supported.