private function getDwnlSnap($datestamp)
    {
        $result = [];
        $query = $this->qSnapOnDate->build();
        $query->order(QSnapOnDate::AS_DWNL_SNAP . '.' . ESnap::A_DEPTH);
        $conn = $query->getConnection();
        $bind = [
            QSnapOnDate::BND_ON_DATE => $datestamp
        ];
        $rows = $conn->fetchAll($query, $bind);
        foreach ($rows as $one) {
            $item = new ESnap($one);
            $custId = $item->getCustomerRef();
            $result[$custId] = $item;
        }
        return $result;
    }