code: private void addPostParams(final Request request) {
          if (expirationDate != null) {
              request.addPostParam("ExpirationDate", expirationDate.toString());
          }
  
          if (details != null) {
              request.addPostParam("Details", details);
          }
  
          if (hiddenDetails != null) {
              request.addPostParam("HiddenDetails", hiddenDetails);
          }
      }
docs: Add the requested post parameters to the Request.
  
  @param request Request to add post params to