code: protected void saveElementValue(String field, Page page) throws TechnicalException, FailureException {
          logger.debug("saveValueInStep: {} in {}.", field, page.getApplication());
          saveElementValue(field, page.getPageKey() + field, page);
      }
docs: Save value in memory using default target key (Page key + field).
  
  @param field
  is name of the field to retrieve.
  @param page
  is target page.
  @throws TechnicalException
  is thrown if you have a technical error (format, configuration, datas, ...) in NoraUi.
  Exception with {@value com.github.noraui.utils.Messages#FAIL_MESSAGE_UNABLE_TO_FIND_ELEMENT} message (with screenshot, with exception) or with
  {@value com.github.noraui.utils.Messages#FAIL_MESSAGE_UNABLE_TO_RETRIEVE_VALUE} message
  (with screenshot, with exception)
  @throws FailureException
  if the scenario encounters a functional error