(untested) add card type implementation
(untested) add card type implementation

billCTG/braintree_ios,braintree/braintree_ios,billCTG/braintree_ios,braintree/braintree_ios,billCTG/braintree_ios,billCTG/braintree_ios,braintree/braintree_ios,braintree/braintree_ios,billCTG/braintree_ios