Does anybody know the status about tree grid?

Does anybody know the status of a embeded tree grid? I am trying to acomplish tree within a grid. Any example will be appreciated.
Thanks
TJ

The current version does not include tree grid. It is still in the plans for the future but at the moment I cannot give any time estimates when the tree grid will be available.

At the moment I would recommend to consider any alternative implementation, for example, using another floating grid for nested rows on top of the main one, or adding/removing sub-rows dynamically when the user presses expand button.