[gtkmm] Setting the background color of a specific cell in a Gtk::Treeview

[Liza Klerck <liza trdlnk com>]

Hi,
I have a [Gtk::TreeViewColumn] and a [Gtk::TreeModel::Row] - how do I 
get to the cellrenderer in order to set the background color of this 
specific cell for this column and row in a Gtk::Treeview ? I need to set 
and reset background colors for specific cells on certain events. I 
understand how to set the background color of an entire column but need 
to know how to set it for individual cells.
Thanks !
Liza Klerck