code: public FessMessages addErrorsAppDoubleSubmitRequest(String property) {
          assertPropertyNotNull(property);
          add(property, new UserMessage(ERRORS_APP_DOUBLE_SUBMIT_REQUEST));
          return this;
      }
docs: Add the created action message for the key 'errors.app.double.submit.request' with parameters.
  <pre>
  message: Your request might have been processed before this request. Please check and retry it.
  </pre>
  @param property The property name for the message. (NotNull)
  @return this. (NotNull)