comp.add(r1c1, new Revision(0x10, 0, 0));
comp.add(r2c1, new Revision(0x20, 0, 0));
// there's no range for c2, and therefore this
// revision must be considered to be in the future
assertTrue(comp.compare(r1c2, r2c1) > 0);
// add a range for r2r2
comp.add(r2c2, new Revision(0x30, 0, 0));
// now there is a range for c2, but the revision is old,