class TimeColumn extends AbstractColumn<TimeColumn, LocalTime> implements CategoricalColumn<LocalTime>,
        TimeFilters,
        TimeFillers<TimeColumn>,
        TimeMapFunctions {

  @Override
  public int countMissing() {
    int count = 0;
    for (int i = 0; i < size(); i++) {
      if (getIntInternal(i) == TimeColumnType.missingValueIndicator()) {
        count++;
      }
    }
    return count;
  }

  private  TimeColumn(String name, IntArrayList times);
  private  TimeColumn(String name);

}