code: public CoinbaseTransaction sendMoneyCoinbaseRequest(CoinbaseSendMoneyRequest transactionRequest)
        throws IOException {
  
      final CoinbaseTransaction pendingTransaction =
          coinbase.sendMoney(
              new CoinbaseTransaction(transactionRequest),
              exchange.getExchangeSpecification().getApiKey(),
              signatureCreator,
              exchange.getNonceFactory());
      return handleResponse(pendingTransaction);
    }
docs: Authenticated resource which lets you send money to an email or Bitcoin address.
  
  @param transactionRequest
  @return A completed {@code CoinbaseTransaction} representing the desired {@code
  CoinbaseSendMoneyRequest}.
  @throws IOException
  @see <a
  href="https://coinbase.com/api/doc/1.0/transactions/send_money.html">coinbase.com/api/doc/1.0/transactions/send_money.html</a>