public CompositeImmutableSegment createCompositeImmutableSegment(final CellComparator comparator,
    List<ImmutableSegment> segments) {
    return new CompositeImmutableSegment(comparator, segments);
  }
A singleton store segment factory. Generate concrete store segments.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SegmentFactory.java