following signals via tcl rtl package

Hello!

Is there a way to follow signals trough the design hierarchy with the ::quartus::rtl TCL package?

I'd like to find out in a TCL script if a spezific toplevel pin is connected to anything in one of the lower design modules. The script should run after map, before the fitter.

I've been trying to use the get_rtl_get_pins, _fanouts etc... commands but didn't succeed to follow the connection of a toplevel pin into a submodule.

Regards,

Ego