protected void redraw() {
SVGPlot svgp = task.getPlot();
final List<Cluster<Model>> allcs = clustering.getAllClusters();
MarkerLibrary ml = context.getStyleLibrary().markers();
layer = svgp.svgElement(SVGConstants.SVG_G_TAG);
// Add a label for the clustering.
{
Element label = svgp.svgText(0.1, 0.7, clustering.getLongName());
label.setAttribute(SVGConstants.SVG_STYLE_ATTRIBUTE, "font-size: 0.4");