public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof DefaultPolarItemRenderer)) {
            return false;
        }
        DefaultPolarItemRenderer that = (DefaultPolarItemRenderer) obj;
        if (!this.seriesFilled.equals(that.seriesFilled)) {
            return false;
        }
        return super.equals(obj);