this.selectionLayer = new SelectionLayer(columnHideShowLayer);
// use a cell layer painter that is configured for left clipping
// this ensures that the rendering works correctly for split
// viewports
this.selectionLayer.setLayerPainter(new SelectionLayerPainter(true,
false));
// create a ViewportLayer for the left part of the table and
// configure it to only contain
// the first 5 columns