Is There a Way where I can Add a Simple Message Row on the the Top of Grouped Rows?

Problem:
Is there a way where I can add a simple message row on the the top of grouped rows. I.e.If I have grouped rows in a table and let us say one row has 20 or 30 sub rows in that grouped row. When I expand the grouped row, I will be able to see all the sub rows. In this context, is there a way that I can add a simple message row saying "this is a grouped row belongs to this group" Or any other html content in that row which can act as banner or caption for the sub rows and will be visible on the top if sub rows when expanded.

Answer:
Unfortunately no, there is no way to do that. You can put the message in the grouped row, but not the children rows.