@Override
  public void updateLatestBlockSizes(HFileContext context, int uncompressed, int compressed) {
  }
Empty implementation. Does nothing.
@param uncompressed the uncompressed size of last block written.
@param compressed   the compressed size of last block written.
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/UncompressedBlockSizePredicator.java