Get file descriptor of a TFile?

Is there any way to get the file descriptor of a TFile? I see that TFile has a protected data member fD, but there’s no method to extract it. I would prefer not to subclass it just to add a method to get hold of the file descriptor.

              cheers,  Charles.

http://root.cern.ch/root/html/TFile.html#TFile:GetFd

Well, that’s embarrassing!

 thanks,   Charles.