public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof XYSeries)) {
            return false;
        }
        if (!super.equals(obj)) {
            return false;
        }
        XYSeries that = (XYSeries) obj;
        if (this.maximumItemCount != that.maximumItemCount) {
            return false;
        }
        if (this.autoSort != that.autoSort) {
            return false;
        }
        if (this.allowDuplicateXValues != that.allowDuplicateXValues) {
            return false;
        }
        if (!ObjectUtilities.equal(this.data, that.data)) {
            return false;
        }
        return true;
    }