This solution works nice-and-fast as far as you accept its “drawback”: all columns will be labels.
If you ever need to have custom components for dynamically-built datagrids then you’ll have to build each row with a DataRowPanel, just like @Callipygean was doing.
Or - at least - this is my comprehension of this thing and I couldn’t find a better way to do that.
So, selfishly (I admit 
), I leverage this post to revive an unanswered post of mine dated aug 14th about a similar quesiton and post again the proof of concept clone-app link.
If there’s a better way to do that, I’d be happy to learn it.
BR