public function initialize(array $parameters = array())
 {
     $parentInitialize = Parent::initialize($parameters);
     Braintree\Configuration::reset();
     Braintree\Configuration::environment($this->getTestMode());
     Braintree\Configuration::merchantId($this->getMerchantId());
     Braintree\Configuration::publicKey($this->getPublicKey());
     Braintree\Configuration::privateKey($this->getPrivateKey());
     return $parentInitialize;
 }