Braintree\Transaction::factory PHP Метод

    public static function factory($attributes)
    {
        $instance = new self();
        $instance->_initialize($attributes);
        return $instance;
    }

 public function testIsset()
 {
     $t = Braintree\Transaction::factory(['creditCard' => ['expirationMonth' => '05', 'expirationYear' => '2010', 'bin' => '510510', 'last4' => '5100'], 'customer' => [], 'billing' => [], 'descriptor' => [], 'shipping' => [], 'subscription' => ['billingPeriodStartDate' => '1983-07-12'], 'statusHistory' => []]);
     $this->assertTrue(isset($t->creditCard));
     $this->assertFalse(empty($t->creditCard));
 }