a GtkWidget
location to store the length of the class path, or NULL. out[allow-none]
location to store the class path as an allocated string, or NULL. out[allow-none]
location to store the reverse class path as an allocated string, or NULL. out[allow-none]
Warning gtk_widget_class_path has been deprecated since version 3.0 and should not be used in newly-written code. Use gtk_widget_get_path() instead Same as gtk_widget_path(), but always uses the name of a widget's type, never uses a custom name set with gtk_widget_set_name().