Wraping text in TreeView

[PerBeatus <perbeatus os pl>]

Hello.

I have a big problem and don't know where to hit with it.
I'm developing a small program and i'm using Gtk::TreeView in it. I've 
wanted to wrap the text so I've went to http://gtk.org/doc, I've 
searched and write somthink like:

cell_renderer_text->property_wrap_mode() = Pango::WRAP_WORD;
cell_renderer_text->property_wrap_width() = 200;

But hey! When I'm compiling it theres an error that says that there is 
no such methods in Gtk::CellRendererText class. So why it is in 
documentation?? And How i should wrap my text in TreeView then?

Please help me.

P.S.
Sorry for my english ;)


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