public BodyLayerStack(List<T> values,
				IColumnPropertyAccessor<T> columnPropertyAccessor,
				ConfigRegistry configRegistry) {
			// wrapping of the list to show into GlazedLists
			// see http://publicobject.com/glazedlists/ for further information
			long startTime= System.currentTimeMillis();
			this.eventList = GlazedLists.eventList(values);
			TransformedList<T, T> rowObjectsGlazedList = GlazedLists
					.threadSafeList(eventList);

			// use the SortedList constructor with 'null' for the Comparator
			// because the Comparator
			// will be set by configuration
			this.sortedList = new SortedList<T>(rowObjectsGlazedList, null);
			// wrap the SortedList with the FilterList
			this.filterList = new FilterList<T>(sortedList);

			// Use the GroupByDataLayer instead of the default DataLayer
			this.bodyDataLayer = new GroupByDataLayer<T>(getGroupByModel(),
					filterList, columnPropertyAccessor, configRegistry);
			// get the IDataProvider that was created by the GroupByDataLayer
			this.bodyDataProvider = bodyDataLayer.getDataProvider();

			// layer for event handling of GlazedLists and PropertyChanges
			GlazedListsEventLayer<T> glazedListsEventLayer = new GlazedListsEventLayer<T>(
					bodyDataLayer, filterList);

			ColumnReorderLayer columnReorderLayer = new ColumnReorderLayer(
					glazedListsEventLayer);
			ColumnHideShowLayer columnHideShowLayer = new ColumnHideShowLayer(
					columnReorderLayer);
			this.selectionLayer = new SelectionLayer(columnHideShowLayer);

			// add a tree layer to visualise the grouping
			TreeLayer treeLayer = new TreeLayer(selectionLayer,
					bodyDataLayer.getTreeRowModel());

			ViewportLayer viewportLayer = new ViewportLayer(treeLayer);

			setUnderlyingLayer(viewportLayer);
			long stop= System.currentTimeMillis();
			
			System.out.println("Body layer stack take : "+(stop-startTime)/1000+" seconds");
		}