Braintree\Configuration::reset PHP Method

    public static function reset()
    {
        self::$global = new Configuration();
    }

 public static function testMerchantConfig()
 {
     Braintree\Configuration::reset();
     Braintree\Configuration::environment('development');
     Braintree\Configuration::merchantId('test_merchant_id');
     Braintree\Configuration::publicKey('test_public_key');
     Braintree\Configuration::privateKey('test_private_key');
 }