code: public SourceTransactionCollection sourceTransactions(
        Map<String, Object> params, RequestOptions options) throws StripeException {
      String url =
          String.format(
              "%s%s",
              Stripe.getApiBase(),
              String.format(
                  "/v1/sources/%s/source_transactions", ApiResource.urlEncodeId(this.getId())));
      return requestCollection(url, params, SourceTransactionCollection.class, options);
    }
docs: List source transactions for a given source.