Hide [+]/[-] toggle sign when group doesnot have any member

Hi,

I need help to hide [+]/[-] sign when a group doesnot have any item in it. Currently, I have a table with a group header where I put the companyName and in the detail section I put the users for that company. I want that, if a company doesnot have any users then there should not be any [+]/[-] sign next to it. Please help!!

Thanks,

-Rohit

Does any one know the answer to this one?

Thanks.