code: public boolean withdrawToRipple(BigDecimal amount, Currency currency, String rippleAddress)
        throws IOException {
  
      final String result =
          bitsoAuthenticated.withdrawToRipple(
              exchange.getExchangeSpecification().getApiKey(),
              signatureCreator,
              exchange.getNonceFactory(),
              amount,
              currency.getCurrencyCode(),
              rippleAddress);
      return "ok".equals(result);
    }
docs: Withdraws funds to Ripple and associates the receiving Ripple address with the Bitso account
  for deposits. NOTE: The Ripple address associated to your account for deposits will be updated
  accordingly! Please ensure that any subsequent Ripple funding emanates from this address.
  
  @return true if withdrawal was successful.