Queue::run

static function run()
{
	if (
		defined('DisableMessageServiceCheck') && DisableMessageServiceCheck === true
		|| (
			!defined('DisableMessageServiceCheck')
			&& defined("DisableEventsCheck")
			&& DisableEventsCheck === true
		)
	)
	{
		return null;
	}

	if (!static::hasMessages())
	{
		return "";
	}

	Application::getInstance()->addBackgroundJob([get_called_class(), "sendMessages"]);

	return "";
}