Gtkmm widgets move semantics.

["Germán Diago" <germandiago gmail com>]

I would like to know if it's planned to add move (no copy) semantics in widgets
for gtkmm. I would like to have this feature, since that makes easier to manage
by value many widgets. Is it a planned feature to add this? I think
it's a trivial
extension (just adding a move constructor to every class it needs to
be movable).
Thanks in advance.