Connect to a TreeModelColumn signal?

[Dennis Craven <arker rogers com>]

Hello list,

I have a Gtk::TreeModelColumn<bool> member in a class that I'm writing 
that I'd like to recieve toggled signals from. Basically, I'm guessing I 
need to be able to get at the underlying Gtk::CellRendererToggle object 
and connect to its signal_toggled(). How does one do this?

Thanks,
~djc