Braintree\Gateway::address PHP Method

    public function address()
    {
        return new AddressGateway($this);
    }

 public function testGatewayCreate()
 {
     $customer = Braintree\Customer::createNoValidate();
     $gateway = new Braintree\Gateway(['environment' => 'development', 'merchantId' => 'integration_merchant_id', 'publicKey' => 'integration_public_key', 'privateKey' => 'integration_private_key']);
     $result = $gateway->address()->create(['customerId' => $customer->id, 'streetAddress' => '1 E Main St', 'locality' => 'Chicago', 'region' => 'IL', 'postalCode' => '60622']);
     $this->assertTrue($result->success);
     $address = $result->address;
     $this->assertEquals('1 E Main St', $address->streetAddress);
     $this->assertEquals('Chicago', $address->locality);
     $this->assertEquals('IL', $address->region);
     $this->assertEquals('60622', $address->postalCode);
 }