if (clone.legendItemLabelGenerator instanceof PublicCloneable) {
            clone.legendItemLabelGenerator = (XYSeriesLabelGenerator)
                    ObjectUtilities.clone(this.legendItemLabelGenerator);
        }
        if (clone.legendItemToolTipGenerator instanceof PublicCloneable) {
            clone.legendItemToolTipGenerator = (XYSeriesLabelGenerator)
                    ObjectUtilities.clone(this.legendItemToolTipGenerator);
        }
        if (clone.legendItemURLGenerator instanceof PublicCloneable) {
            clone.legendItemURLGenerator = (XYSeriesLabelGenerator)
                    ObjectUtilities.clone(this.legendItemURLGenerator);