public function CDC($entityList, $changedSince)
    {
        $this->serviceContext->IppConfiguration->Logger->CustomLogger->Log(TraceLevel::Info, "Called Method CDC.");

        // Validate parameter
        if (count($entityList) <= 0) {
            $exception = new IdsException('ParameterNotNullMessage');
            $this->serviceContext->IppConfiguration->Logger->CustomLogger->Log(TraceLevel::Error, "ParameterNotNullMessage");
            IdsExceptionManager::HandleException($exception);
        }

        $entityString = implode(",", $entityList);

        $query = null;
        $uri = null;

        if(is_string($changedSince)){
           $formattedChangedSince = trim($changedSince);
        }else{
            $formattedChangedSince = date("Y-m-d\TH:i:s", $this->verifyChangedSince($changedSince));
        }

        $query = "entities=" . $entityString . "&changedSince=" . $formattedChangedSince;
        $uri = "company/{1}/cdc?{2}";
        //$uri = str_replace("{0}", CoreConstants::VERSION, $uri);
        $uri = str_replace("{1}", $this->serviceContext->realmId, $uri);
        $uri = str_replace("{2}", $query, $uri);

        // Creates request parameters
        $requestParameters = $this->getGetRequestParameters($uri, CoreConstants::CONTENTTYPE_APPLICATIONXML);
        $restRequestHandler = $this->getRestHandler();

        list($responseCode, $responseBody) = $restRequestHandler->sendRequest($requestParameters, null, null, $this->isThrownExceptionOnError());
        $faultHandler = $restRequestHandler->getFaultHandler();
        if ($faultHandler) {
            $this->lastError = $faultHandler;
            return null;
        } else {
            $this->lastError = false;
            $returnValue = new IntuitCDCResponse();
            try {
                $xmlObj = simplexml_load_string($responseBody);
                $responseArray = $xmlObj->CDCResponse->QueryResponse;
                if(sizeof($responseArray) != sizeof($entityList)){
                    throw new ServiceException("The number of Entities requested on CDC does not match the number of Response.");
                }

                for($i = 0; $i < sizeof($responseArray); $i++){
                    $currentResponse = $responseArray[$i];
                    $currentEntityName = $entityList[$i];
                    $entities = $this->responseSerializer->Deserialize($currentResponse->asXML(), false);
                    $entityName = $currentEntityName;
                    //If we find the actual name, update it.
                    foreach ($currentResponse->children() as $currentResponseChild) {
                        $entityName = (string)$currentResponseChild->getName();
                        break;
                    }
                    $returnValue->entities[$entityName] = $entities;
                }
            } catch (\Exception $e) {
                IdsExceptionManager::HandleException($e);
            }

            $this->serviceContext->IppConfiguration->Logger->CustomLogger->Log(TraceLevel::Info, "Finished Executing Method CDC.");
            return $returnValue;
        }
    }