@Override
  public Log getLogger() {
    if (LOGGER == null) {
      LOGGER = LogFactory.getLog(DeltaSessionManager.class);
    }
    return LOGGER;
  }
@deprecated No replacement. Always prefer deserialized form.
extensions/geode-modules/src/main/java/org/apache/geode/modules/session/catalina/DeltaSessionManager.java