Rounded corners needed for the Primefaces datatable.

Link to test case:
Debugger code (debug.datatables.net):
Error messages shown:
Description of problem: I have a primefaces datatable which get the data filled dynamically. The last row of the table has sharp edges. I want the last row of the datatable to have rounded edges. How can this be achieved.
Tried approaches by adding border-radius to ui-datatable-tablewrapper and also to the last child of the last row of the table.
When border-radius style is applied to ui-datatable-tablewrapper the corners become transparent without a border. How to make it a proper rounded corner.