Has a Toolbar some way to "pack_end" a single ToolItem?

[fidel <fidel daniels li>]

I am still very new to gtkmm and right now I would like to build a
toolbar. I would like to add some items to the right, actually to the
end of the toolbar. Just the same way as other containers do it with
their methods pack_end. Is this possible? How?

Thanks for any hints!
Greets
David