sortedSet.add(reaperElement);
sortedSet.add(reaperElement3);
sortedSet.add(reaperElement2);
assertEquals(sortedSet.first(), reaperElement3);
assertEquals(sortedSet.last(), reaperElement);
// test insertion of timeout=0 is a nullop
assertTrue(reaper.insert(reapable, 0));
assertEquals(0, reaper.numberOfTransactions());
assertEquals(0, reaper.numberOfTimeouts());