Getting rid of ListStores

["John M. Burian" <john burian org>]

I have an application that creates and destroys a fair number of 
ComboBoxes, each of which requires a TreeModel (I'm using ListStores). I 
understand that I can use the same model for multiple ComboBoxes. The 
question is, ListStores aren't widgets, they don't have a destroy() 
method, so do they behave like plain ol' Perl data structures? That is, 
they persist so long as a reference is being held somewhere, but then 
get automatically garbage collected? Is Gtk okay with that?

John