docs: public static Protos.PaymentRequest.Builder createPaymentRequest(NetworkParameters params,
              @Nullable Coin amount, Address toAddress, @Nullable String memo, @Nullable String paymentUrl,
              @Nullable byte[] merchantData) {
          return createPaymentRequest(params, ImmutableList.of(createPayToAddressOutput(amount, toAddress)), memo,
                  paymentUrl, merchantData);
      }