I am using PHP Adwords APIs to fetch the final urls of keywords but it always returns null
// Get the service, which loads the required classes.
$adGroupCriterionService = $adWordsServices->get($session, AdGroupCriterionService::class);
// Create selector.
$selector = new Selector();
$selector->setFields(['KeywordText', 'KeywordMatchType', 'Id','Status','TopOfPageCpc','CpcBid','FinalUrls']);
$selector->setOrdering([new OrderBy('KeywordText', 'ASCENDING')]);
// Create predicates.
$selector->setPredicates([new Predicate('AdGroupId', PredicateOperator::IN, [$adGroupId] )] );
$selector->setPredicates([new Predicate('CriteriaType', PredicateOperator::IN, ['KEYWORD'] )] );
$selector->setPredicates([new Predicate('Id', PredicateOperator::IN, [$keywordId] )] );
Google\AdsApi\AdWords\v201609\cm\BiddableAdGroupCriterion Object
(
[userStatus:protected] => ENABLED
[systemServingStatus:protected] =>
[approvalStatus:protected] =>
[disapprovalReasons:protected] =>
[destinationUrl:protected] =>
[firstPageCpc:protected] =>
[topOfPageCpc:protected] => Google\AdsApi\AdWords\v201609\cm\Bid Object
(
[amount:protected] => Google\AdsApi\AdWords\v201609\cm\Money Object
(
[microAmount:protected] => 123456
[ComparableValueType:protected] =>
[ComparableValue.Type] => Money
)
)
[firstPositionCpc:protected] =>
[qualityInfo:protected] =>
[biddingStrategyConfiguration:protected] => Google\AdsApi\AdWords\v201609\cm\BiddingStrategyConfiguration Object
(
[biddingStrategyId:protected] =>
[biddingStrategyName:protected] =>
[biddingStrategyType:protected] => MANUAL_CPC
[biddingStrategySource:protected] =>
[biddingScheme:protected] =>
[bids:protected] => Array
(
[0] => Google\AdsApi\AdWords\v201609\cm\CpcBid Object
(
[bid:protected] => Google\AdsApi\AdWords\v201609\cm\Money Object
(
[microAmount:protected] => 12340000
[ComparableValueType:protected] =>
[ComparableValue.Type] => Money
)
[cpcBidSource:protected] => CRITERION
[BidsType:protected] =>
[Bids.Type] => CpcBid
)
)
)
[bidModifier:protected] =>
[finalUrls:protected] =>
[finalMobileUrls:protected] =>
[finalAppUrls:protected] =>
[trackingUrlTemplate:protected] =>
[urlCustomParameters:protected] =>
[criterionUse:protected] => BIDDABLE
[criterion:protected] => Google\AdsApi\AdWords\v201609\cm\Keyword Object
(
[text:protected] => Test Keyword ABCD
[matchType:protected] => PHRASE
[type:protected] => KEYWORD
[CriterionType:protected] =>
[Criterion.Type] => Keyword
)
[labels:protected] =>
[forwardCompatibilityMap:protected] =>
[baseCampaignId:protected] =>
[baseAdGroupId:protected] =>
[AdGroupCriterionType:protected] =>
[AdGroupCriterion.Type] => BiddableAdGroupCriterion
)