primefaces p:rowExpansion

I am using primefaces2.2.1 in my jsf2.0 application. I have problem with datatable rowExpansion which contains another datatable. So, I want to add/remove/edit row in inner datatable (datatable which is in expanded row) and update it after action has preformed. Also I want to keep current row expanded after update. One solution is: updating whole datatable and expanding selected row after update but it gives bad visual开发者_StackOverflow effect...