code: @Override
  	public FileBaseStatistics getStatistics(BaseStatistics cachedStats) throws IOException {
  		final FileBaseStatistics stats = super.getStatistics(cachedStats);
  		return stats == null ? null : 
  			new FileBaseStatistics(stats.getLastModificationTime(), stats.getTotalInputSize(), this.recordLength);
  	}
docs: {@inheritDoc}
  @throws IOException