app\Todo::events PHP Method

    public static function events(EventEmitter $emitter)
    {
        $emitter->on("beforeInsert", function (EntityInterface $entity, MapperInterface $mapper) {
            $entity->uid = Base62::encode(random_bytes(9));
        });
        $emitter->on("beforeUpdate", function (EntityInterface $entity, MapperInterface $mapper) {
            $entity->updated_at = new \DateTime();
        });
    }