code: private void addPostParams(final Request request) {
          if (dateExpiry != null) {
              request.addPostParam("DateExpiry", dateExpiry.toString());
          }
  
          if (ttl != null) {
              request.addPostParam("Ttl", ttl.toString());
          }
  
          if (mode != null) {
              request.addPostParam("Mode", mode.toString());
          }
  
          if (status != null) {
              request.addPostParam("Status", status.toString());
          }
  
          if (participants != null) {
              for (Map<String, Object> prop : participants) {
                  request.addPostParam("Participants", Converter.mapToJson(prop));
              }
          }
      }
docs: Add the requested post parameters to the Request.
  
  @param request Request to add post params to