code: private function getCalcData()
      {
          /**
           * Get period & calc data.
           */
          $req = new AGetPeriodRequest();
          $req->setBaseCalcTypeCode(Cfg::CODE_TYPE_CALC_COMPRESS_PHASE1);
          $req->setDepCalcTypeCode(Cfg::CODE_TYPE_CALC_VALUE_TV);
          /** @var AGetPeriodResponse $resp */
          $resp = $this->servPeriodGet->exec($req);
          /** @var ECalc $compressCalc */
          $compressCalc = $resp->getBaseCalcData();
          /** @var ECalc $tvCalc */
          $tvCalc = $resp->getDepCalcData();
          /**
           * Compose result.
           */
          $result = [$compressCalc, $tvCalc];
          return $result;
      }
docs: Get data for periods/calculations.
  
  @return array [$compressCalc, $tvCalc]
  @throws \Exception