gtk:widget-snapshot (widget snapshot)

widget -- a gtk:widget object
snapshot -- a gtk:snapshot object as passed to the widget, in particular, no calls to the gtk:snapshot-translate function or other transform calls should have been made

Calls the gtk:widget-snapshot virtual function for widget and its children when a new snapshot of widget has to be taken. This function is not exported from the C library and implemented for the Lisp API with the gtk:widget-snapshot-child function.