[pygtk] Tracking 'notify::width' events from Gtk.TreeViewColumn - what do to with the GParamSpec parameter

[Christian Mallwitz]

Hi

I'm trying to track 'notify::width' events from Gtk.TreeViewColumn as
described in https://mail.gnome.org/archives/gtk-list/2009-September/msg00094.html

While there are view resources explaining that it can be done, I can't
find some explanation of what to do with the width parameter send to
event handler function. It is