class InstantColumn extends AbstractColumn<InstantColumn, Instant> implements InstantMapFunctions,
        TemporalFillers<Instant, InstantColumn>,
        TemporalFilters<Instant>,
        CategoricalColumn<Instant> {

  @Override
  public int countUnique() {
    LongSet ints = new LongOpenHashSet(data.size());
    for (long i : data) {
      ints.add(i);
    }
    return ints.size();
  }

  private  InstantColumn(String name, LongArrayList data);

}