public static ExtendibleMapFactory largeSize() {
    //approx. 64M (key,value) pairs
    int segmentSize = ExtendibleHashMap.DEFAULT_SEGMENT_SIZE * 2;
    int pageSize = segmentSize * ExtendibleHashMap.DEFAULT_SEGMENTS_PER_PAGE;
    return new ExtendibleMapFactory(
      pageSize,
      segmentSize,
      IGNORE_AND_HOPE_FOR_THE_BEST,
      /*eagerlyCheckFileCompatibility: */ true,
      /*cleanFileIfIncompatible:       */ false
    );
  }
public static ExtendibleMapFactory largeSize()