code: private static void loadLoggerConfiguration() {
          LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
          context.reset();
  
          JoranConfigurator configurator = new JoranConfigurator();
          configurator.setContext(context);
          try {
              configurator.doConfigure(LOGBACK_CONF_FILE);
          } catch (JoranException je) {
              Logger.getLogger(StrategyExecutionLogging.class.getName()).log(Level.SEVERE, "Unable to load Logback configuration", je);
          }
      }
docs: Loads the Logback configuration from a resource file.
  Only here to avoid polluting other examples with logs. Could be replaced by a simple logback.xml file in the resource folder.