ICalUtil::getUsersByCode

static function getUsersByCode(array $attendeesCodeList = null): array
{
	$userIdsList = [];
	foreach ($attendeesCodeList as $code)
	{
		if(mb_strpos($code, 'U') === 0)
		{
			$userIdsList[] = (int)mb_substr($code, 1);
		}
	}

	return self::getIndexUsersById($userIdsList);
}