Function invoke_app_notify 

pub fn invoke_app_notify(
    node: &NodeProto,
    _inputs: &[(&str, &dyn SlotValue)],
    ctx: &mut RuntimeResourceRef<'_>,
) -> Result<DispatchResult, OpError>

AppNotify(trigger, name: string) → Sink. See invoke_app_emit for the reserved-prefix validation rule that applies here too.