Air Rename File

Ok before I start this one may be so obvious but I just can't find a simple way of doing it.

I just need to know if there is a command, i assume in File, to rename a file? I can delete, copy, move etc but can't find rename. The only I can think of at the moment is to copy with the new name and delete the original.

I have file names displaying in a datagrid and would like to have a one click to rename the selected item. Can this be done with filestream?

Any help appreciated.

Cheers
Peter