#define GTK_PIZZA(obj) GTK_CHECK_CAST (obj, gtk_pizza_get_type (), GtkPizza)
#define GTK_PIZZA_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, gtk_pizza_get_type (), GtkPizzaClass)
#define GTK_IS_PIZZA(obj) GTK_CHECK_TYPE (obj, gtk_pizza_get_type ())
#define GTK_PIZZA(obj) GTK_CHECK_CAST (obj, gtk_pizza_get_type (), GtkPizza)
#define GTK_PIZZA_CLASS(klass) GTK_CHECK_CLASS_CAST (klass, gtk_pizza_get_type (), GtkPizzaClass)
#define GTK_IS_PIZZA(obj) GTK_CHECK_TYPE (obj, gtk_pizza_get_type ())