use FacebookAds\Object\AdAccount;
use FacebookAds\Object\Fields\AdSetFields;

$account = new AdAccount('act_<AD_ACCOUNT_ID>');
$adsets = $account->getAdSets(array(
  AdSetFields::NAME,
  AdSetFields::CONFIGURED_STATUS,
  AdSetFields::EFFECTIVE_STATUS,
));

foreach ($adsets as $adset) {
  echo $adset->{AdSetFields::NAME}.PHP_EOL;
}

from facebookads.adobjects.adaccount import AdAccount
from facebookads.adobjects.adset import AdSet

account = AdAccount('act_<AD_ACCOUNT_ID>')
adsets = account.get_ad_sets(fields=[AdSet.Field.name])

for adset in adsets:
    print(adset[AdSet.Field.name])

APINodeList<AdSet> adSets = new AdAccount(act_<AD_ACCOUNT_ID>, context).getAdSets()
  .requestNameField()
  .requestConfiguredStatusField()
  .requestEffectiveStatusField()
  .execute();

curl -G \
-d "fields=name" \
-d "access_token=<ACCESS_TOKEN>" \                                                     
"https://graph.facebook.com/act_<AD_ACCOUNT_ID>/adsets"