CIMMessenger::disappearMessage

static function disappearMessage(int $messageId, int $hours, ?int $userId = null): bool
{
	if (!self::CheckPossibilityUpdateMessage(IM_CHECK_DELETE, $messageId, $userId))
	{
		return false;
	}

	$message = new BitrixImV2Message($messageId);
	if (!$message->getMessageId())
	{
		return false;
	}

	$result = BitrixImV2MessageDeleteDisappearService::disappearMessage($message, $hours);
	return $result->isSuccess();
}