CXMPPClient::GetPresenceIBlockId

static function GetPresenceIBlockId($clientDomain)
{
	static $arPresenceIBlockIdCache = array();

	if (!array_key_exists($clientDomain, $arPresenceIBlockIdCache))
	{
		CXMPPUtility::ClearOptionsCache("xmpp");
		$arPresenceIBlockIdCache[$clientDomain] = COption::GetOptionInt('xmpp', 'iblock_presence');
	}

	return $arPresenceIBlockIdCache[$clientDomain];
}