class StripeSourceTypeModel extends StripeJsonModel {

    static void putAdditionalFieldsIntoMap(
            @Nullable Map<String, Object> map,
            @Nullable Map<String, Object> additionalFields) {
        if (map == null || additionalFields == null || additionalFields.isEmpty()) {
            return;
        }

        for(String key : additionalFields.keySet()) {
            map.put(key, additionalFields.get(key));
        }
    }

      StripeSourceTypeModel();

}