code: public void setLastAccessTime(long lastAccessTime) {
      while (true) {
        long current = this.lastAccessTime;
        if (current >= lastAccessTime) {
          break;
        }
        if (ACCESSTIME_UPDATER.compareAndSet(this, current, lastAccessTime)) {
          break;
        }
      }
    }
docs: Set the last time this entry was accessed in milliseconds.
  
  @param lastAccessTime last time the entry was accessed