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

  public double[] asDoubleArray() {
    double[] doubles = new double[data.size()];
    for (int i = 0; i < size(); i++) {
      doubles[i] = data.getByte(i);
    }
    return doubles;
  }

  private  BooleanColumn(String name, ByteArrayList values);

}