code: private void addPostParams(final Request request) {
          if (code != null) {
              request.addPostParam("Code", code);
          }
  
          if (to != null) {
              request.addPostParam("To", to);
          }
  
          if (verificationSid != null) {
              request.addPostParam("VerificationSid", verificationSid);
          }
  
          if (amount != null) {
              request.addPostParam("Amount", amount);
          }
  
          if (payee != null) {
              request.addPostParam("Payee", payee);
          }
      }
docs: Add the requested post parameters to the Request.
  
  @param request Request to add post params to