I am trying to add Income Tiers (TIER_1, TIER_2 etc) to a location by using this code (PHP) but getting error message Fatal error: Class 'App\Targeting\FeedFunction' not found
$session = $sessionBuilder->withClientCustomerId($customerId)->build();
$campaignCriterionService = $adWordsServices->get($session, CampaignCriterionService::class);
$campaignCriteria = [];
$operations = [];
$campaignCriteria = [];
$incomeTierArr = array('TIER_1', 'TIER_2', 'TIER_3', 'TIER_4', 'TIER_5', 'TIER_6_TO_10');
foreach($incomeTierArr as $tier) {
$tier = new IncomeOperand($tier);
$Loc = new GeoTargetOperand(array($location));
$firstGroup = new LocationGroups();
$firstGroup->setMatchingFunction(new FeedFunction('AND', $tier, $Loc));
$campaignCriteria[] = new CampaignCriterion($campaignId, null, $firstGroup);
}
foreach ($campaignCriteria as $campaignCriterion) {
$operations[] = new CampaignCriterionOperation($campaignCriterion, 'ADD');
}
$result = $campaignCriterionService->mutate($operations);