function testExpiringBetween_parsesCreditCardDetailsUnderTransactionsCorrectly()
 {
     $collection = Braintree_CreditCard::expiringBetween(mktime(0, 0, 0, 1, 1, 2010), mktime(23, 59, 59, 12, 31, 2010));
     $this->assertTrue($collection->maximumCount() > 1);
     foreach ($collection as $creditCard) {
         foreach ($creditCard->subscriptions as $subscription) {
             foreach ($subscription->transactions as $transaction) {
                 $this->assertNotNull($transaction->creditCardDetails->expirationMonth);
             }
         }
     }
 }