Class dictionaries in ROOT files?

Hi, I remember that there was some development efforts about storing the class dictionaries (cint, reflex?) in .root files. What is the status of this? My goal would be to be able to load a file containing several of my TObject-derived objects without getting the msg "Warning in
<TClass::TClass>: no dictionary for class foo::bar is available" when I
forget to load the otherwise not useful libfoobar.so libraries that contain the source code for these. I believe this is not achievable by something as simple as myObject::Class()->Write() while being cd() in the file of interest, right? :-) Thanks, filimon