code: public String getCreationTime() {
      if (mCreationTimeMs == UIFileInfo.LocalFileInfo.EMPTY_CREATION_TIME) {
        return "";
      }
      return CommonUtils.convertMsToDate(mCreationTimeMs,
          mAlluxioConfiguration.get(PropertyKey.USER_DATE_FORMAT_PATTERN));
    }
docs: Gets creation time.
  
  @return the creation time (in milliseconds)