public class CustomColumnHideShowLayer extends ColumnHideShowLayer {

	public CustomColumnHideShowLayer(IUniqueIndexLayer underlyingLayer) {
		super(underlyingLayer);
	}

	public void hideColumnIndexes(Collection<Integer> columnIndexes) {
		Set<Integer> columnPositions = new HashSet<Integer>();
        for (Integer columnIndex : columnIndexes) {
        	columnPositions
                    .add(Integer
                            .valueOf(getColumnPositionByIndex(columnIndex
                                    .intValue())));
        }
        getHiddenColumnIndexes().addAll(columnIndexes);
        invalidateCache();
        fireLayerEvent(new HideColumnPositionsEvent(this, columnPositions));
    }
}