src/Queries/OldCoreQuery.php
protected function performFetchUsingSelectedMethod($rsItems)
    {
        return $this->fetchUsing['method'] === 'GetNext'
            ? $rsItems->GetNext($this->fetchUsing['params'][0], $this->fetchUsing['params'][1])
            : $rsItems->Fetch();
    }
protected function performFetchUsingSelectedMethod($rsItems)
    {
        return $this->fetchUsing['method'] === 'GetNext'
            ? $rsItems->GetNext($this->fetchUsing['params'][0], $this->fetchUsing['params'][1])
            : $rsItems->Fetch();
    }
Choose between Fetch() and GetNext($bTextHtmlAuto, $useTilda) and then fetch

@param \CDBResult $rsItems
@return array|false