@Override
		public int compare(Interval o1, Interval o2) {
			if (o1.start < o2.start)
				return -1;
			else if (o1.start == o2.start) {
				if (o1.end < o2.end)
					return -1;
				else if (o1.end == o2.end)
					return 0;
				else
					return 1;
			} else
				return 1;
		}