@java.lang.SuppressWarnings("serial")
@SuppressWarnings("SIC")
@Override
protected CategoryItemRenderer createRenderer(final GraphConfiguration configuration, final String pluginName, final ToolTipProvider toolTipProvider) {
SerializableUrlGenerator urlGenerator = new CategoryUrlBuilder(getRootUrl(), pluginName);
SerializableToolTipGenerator toolTipGenerator = new SerializableToolTipGenerator() {
@Override
public String generateToolTip(final CategoryDataset dataset, final int row, final int column) {
int number = 0;
for (int index = 0; index < dataset.getRowCount(); index++) {
Number value = dataset.getValue(index, column);