Getting submenu from a MenuItem

[Toby Gray <toby gray ntlworld com>]

Is there any way of extracting from a MenuItem what submenu it has in 
gtk-perl? The C GTK ::MenuItem does have the method get_submenu, and before I 
start to learn C and work out how to add in the get_submenu method into 
gtk-perl, I was wanting to check that I have not missed a obvious method for 
doing it.

Thanks

Toby