code: protected void showBootLogging() {
          if (logger.isInfoEnabled()) {
              logger.info("[JSON Manager]");
              logger.info(" realJsonParser: " + DfTypeUtil.toClassTitle(realJsonEngine));
              if (mappingOption.isPresent()) { // not use lambda to keep log indent
                  logger.info(" mapping: " + mappingOption.get());
              }
              // print control cannot be changed (deprecated) so no show for now
              if (yourEngineCreator.isPresent()) { // me too
                  logger.info(" creator: " + yourEngineCreator.get());
              }
          }
      }
docs: ------------