@Override
  public String toString() {
    StringBuilder sb =
      new StringBuilder("This is CompositeImmutableSegment and those are its segments:: ");
    for (ImmutableSegment s : segments) {
      sb.append(s.toString());
    }
    return sb.toString();
  }
Dumps all cells of the segment into the given log
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/CompositeImmutableSegment.java