@Override
  public void addToEstimator(byte[] value, int offset, int length) {
    throw new UnsupportedOperationException("cannot add byte values to fmsketch");
  }
Resets a distinctValueEstimator object to its original state.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/common/ndv/fm/FMSketch.java