}
private void writeColumns(Clusterer clusterer) {
Cluster[] clusters = clusterer.getClusters();
if (clusters != null && clusters.length > 0) {
ClustererBuilder builder = getBuilder(clusterer);
AttributeModel am = Lookup.getDefault().lookup(AttributeController.class).getModel();
String id = "clustering_" + builder.getName();
String title = "Clustering (" + builder.getName() + ")";
AttributeColumn col = am.getNodeTable().getColumn(id);
if (col == null) {
col = am.getNodeTable().addColumn(id, title, AttributeType.INT, AttributeOrigin.COMPUTED, null);
StatusDisplayer.getDefault().setStatusText("A new column \"" + title + "\" has been created");
}