code: @Override
    public boolean isHistoryLevelAtLeast(HistoryLevel level) {
      if (log.isDebugEnabled()) {
        log.debug("Current history level: {}, level required: {}", historyLevel, level);
      }
      // Comparing enums actually compares the location of values declared in
      // the enum
      return historyLevel.isAtLeast(level);
    }
docs: /*
  (non-Javadoc)
  
  @see org.activiti.engine.impl.history.HistoryManagerInterface# isHistoryLevelAtLeast(org.activiti.engine.impl.history.HistoryLevel)