/**
	 * Compares two <code>Range</code> instances by their widths.
	 * 
	 * @param r1
	 *            a Range
	 * @param r2
	 *            a second Range
	 * @return the value 0 if both Range instances are equal; -1 if r1 is
	 *         narrower than r2; and 1 if r1 is wider than r2
	 */
	public static int compareTo(Range r1, Range r2) {
		int result;
		if (r1 == r2) {
			result = 0;
		} else if (r1.getMinimum() >= r1.getMinimum()) {
			result = 1;
		} else {
			result = -1;
		}
		return result;
	}