gtk:widget-path-iter-object-type (path pos)

path -- a gtk:widget-path instance
pos -- an integer with the position, -1 for the path head
gtype -- a g:type-t type ID

Accessor of the object type. The gtk:widget-path-iter-object-type function returns the g:type-t type ID of the object that is at position pos in the widget hierarchy defined in path. The (setf gtk:widget-path-iter-object-type) function sets the object type.

(setq widget (make-instance 'gtk:button))
=> #<GTK-BUTTON {10027EB373}>
(gtk:widget-path-iter-object-type (gtk:widget-path *) -1)
=> #<GTYPE :name "GtkButton" :id 23267040>