class FilterTableAnswerer extends Answerer {

  @VisibleForTesting
  static Multiset<Row> selectColumns(Set<String> columns, Multiset<Row> inputRows) {
    return inputRows.stream()
        .map(row -> Row.builder().putAll(row, columns).build())
        .collect(ImmutableMultiset.toImmutableMultiset());
  }

  public  FilterTableAnswerer(Question question, IBatfish batfish);

}