Change font,size of column title

[Sirisha Muppavarapu <sirisha muppavarapu veralight com>]

Hi there...

I am looking for the method/piece of code which changes the
font/size,etc of the column title of the columns added to the treeview.

treeView.modify_font(Pango::FontDescription(font));

doesn't seem to be helping. It changes the row's font but not the column
title's font. gtkmm archive emails are of no help. I see many similar
questions but no reply is posted! Any pointers in this direction is
highly appreciated.

Thanks