Forum::bindOldKernelEvents

static function bindOldKernelEvents()  // TODO redesign old forum new to D7 and delete this function
{
	static $bound = false;
	if ($bound === true)
	{
		return;
	}
	$eventManager = BitrixMainEventManager::getInstance();
	$eventManager->addEventHandler("forum", "onAfterForumAdd", [__CLASS__, "clearCache"]);
	$eventManager->addEventHandler("forum", "onAfterForumUpdate", [__CLASS__, "clearCache"]);
	$eventManager->addEventHandler("forum", "OnAfterForumDelete", [__CLASS__, "clearCache"]);
	$bound = true;
}