pub unsafe trait ObjectClassSubclassExt: 'static {
    fn override_signal_class_handler<F>(&mut self, name: &str, class_handler: F)
    where
        F: 'static + Fn(&SignalClassHandlerToken, &[Value]) -> Option<Value> + Send + Sync,
    { ... }
}Expand description
Extension trait for glib::Object’s class struct.
This contains various class methods and allows subclasses to override signal class handlers.