TTimer can use the method TObject::HandleTimer if it has been overriden.
The definition of HandleTimer is : Bool_t HandleTimer(TTimer* timer)
My question is : what should it return ?
It is not explained in the api documentation and I think that it should be added.
I am not an expert in that matter but you can find several implementations of it in the source code. Like in root.cern.ch/root/htmldoc/src/T … r.cxx.html
Also in TProofPlayer.cxx