How to construct a tree that every nodes has an icon

How can I construct a tree which nodes have an icon? I have read the
source code of podbrowser. He used two column: Gtk2::Gdk::Pixbuf
for every node. But when the level of the tree is deeper, the tree will be
The Nautilus of gnome can show the tree what I mean to.
Is there a way in gtk2-perl?

Best regards,
Ye Wenbin

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