GtkItemFactoryEntry callback data

[Phil Krylov <phil mail ru>]

Hello everyone,

I already asked this question but had no answer. Does it mean there
is no possible way to do this? Or everyone who knows the answer is now
too busy releasing 2.0?

The question is:
   Is it possible to assign a GtkDestroyNotify function to destroy the
   callback data when using gtk_item_factory_create_items()?

I'm making a language binding (for Harbour language of the xBase
family), so complexity of this operation does not bother me as long as
it won't be exposed to user.

-- 
Respectful,
 Phil