Elgg\EventsService::registerHandler PHP Method

    public function registerHandler($name, $type, $callback, $priority = 500)
    {
        if (in_array($type, ['member', 'friend', 'attached']) && in_array($name, ['create', 'update', 'delete'])) {
            $this->logger->error("'{$name}, {$type}' event is no longer triggered. Update your event registration " . "to use '{$name}, relationship'");
        }
        return parent::registerHandler($name, $type, $callback, $priority);
    }