dataset.addValue(3.0, "R3", "C1");
dataset.addValue(4.0, "R4", "C1");
map.mapKeyToGroup("R1", "Group A");
map.mapKeyToGroup("R2", "Group A");
map.mapKeyToGroup("R3", "Group B");
map.mapKeyToGroup("R4", "Group B");
r = DatasetUtilities.findStackedRangeBounds(dataset, map);
assertEquals(0.0, r.getLowerBound(), EPSILON);
assertEquals(7.0, r.getUpperBound(), EPSILON);