Marshalling a glib data type

["Andrea Farruggia" <andrea86 gmail com>]

Hi,
There is one more-or-less standard way to marshall a glib data type?

I can of course marshall a data type by breaking their opaqueness (and
this is explicitly discouraged in the doc), or I can just save all the
items using the iterator and recreate every time the structure, but
this solution is a bit slow.

Any suggestion is appreciated.