(glib:define-gboxed-opaque gtk:recent-info "GtkRecentInfo"
  :type-initializer "gtk_recent_info_get_type"
  :alloc (error "GtkRecentInfo cannot be created from the Lisp side."))  

The gtk:recent-info structure constains all the meta-data associated with an entry in the recently used files list. The gtk:recent-info structure is an opaque data structure whose members can only be accessed using the provided API.