$campaignCriterionService = $adWordsServices->get($customerSession, 'CampaignCriterionService', $config->get('version'), 'cm');

                $selector = new Selector();
                $selector->setFields([]); // filled with fields ;)
                $selector->setPredicates([
                    new Predicate('CampaignId', 'EQUALS', [
                        $campaignEntry->getId()
                    ])
                ]);

                /** @var \Google\AdsApi\AdWords\v201601\cm\CampaignCriterionPage $campaignCriterionPage */
                $campaignCriterionPage = $campaignCriterionService->get($selector);


                /** @var \Google\AdsApi\AdWords\v201601\cm\CampaignCriterion $campaignCriterionEntry */
                foreach ((array)$campaignCriterionPage->getEntries() as $campaignCriterionEntry) {
                    echo 'campaign criterion:';
                    var_dump($campaignCriterionEntry);

                    $criterion = $campaignCriterionEntry->getCriterion();

                    if ($criterion instanceof \Google\AdsApi\AdWords\v201601\cm\Location) {
                        echo 'location:';
                        echo $criterion->getLocationName();

                        /** @var \Google\AdsApi\AdWords\v201601\cm\Location $location */
                        foreach ($criterion->getParentLocations() as $location) {
                            echo 'sub location:';
                            echo $location->getLocationName();

                            var_dump($location);
                        }
                    }
                }