Gtk2-Perl equivalent to Gtk::CList::row_is_visible method

[Niel Das <idas watson wustl edu>]

I am using Gtk2::SimpleList to present a list.  The list contains many 
rows, and I was wondering if there is a method or process in Gtk2 that 
will tell if a certain row is currently visible to the user on the screen.  

I am wondering if there is an equivalent method and/or process to the 
Gtk CList's, Gtk::CList::row_is_visible($row) call?  

I am looking at the Gtk2::TreeViewColumn and Gtk2::CellRenderer modules, 
since I think those are the modules that determine how a GtkTreeView is 
displayed... However I cannot seem to notice an equivalent.

Thanks in advance.

Cheers,

Niel