Grouping Row in Datagrid

I would like to group a row with a comment (eg) that's taken in database and when I expand the row I see the comment;
I have used AllowGrouping ="true" in RadzenDataGrid but I can only group all rows with a header. This is not quite what I want.

I would like to have this kind of result, Is there any possibility to do this with RadzenDataGrid?

Thanks in advance to your help

This looks more like hierarchical DataGrid:

Great! I didn't see it.

I want every rows to be expandable
Do I have to write the code in this way

void RowRender(RowRenderEventArgs args)
args.Expandable = args.Data.ECR != "null";

It's OK ; thanks to RowRender and don't forget ExpandMode

Every row is expandable, this is how you make some of the rows not expandable.