class BooleanColumn extends AbstractColumn<BooleanColumn, Boolean> implements BooleanFilterSpec<Selection>,
        BooleanMapUtils,
        CategoricalColumn<Boolean>,
        BooleanFillers<BooleanColumn>,
        BooleanFilters {

  public boolean none() {
    return countTrue() == 0;
  }

  private  BooleanColumn(String name, ByteArrayList values);

}