Implementing IPaymentDetails

[SantoshKSah]

It should support creating Child class implementing IPaymentDetails.

On creating ApplePayPaymentDetails
ApplePayPaymentDetails implements IPaymentDetails

There is an exception com.google.gson.JsonParseException: cannot serialize ; did you forget to register a subtype
Looks like its coming from JSONFormater.

public static RuntimeTypeAdapterFactory paymentDetailsSerializer() {
return RuntimeTypeAdapterFactory
.of(IPaymentDetails.class, "method")
.registerSubtype(PaypalPaymentDetails.class, "paypal")
.registerSubtype(CreditCardPaymentDetails.class, "credit_card")
.registerSubtype(BankWirePaymentDetails.class, "bank_wire");
}