UtilityTest.assertEqualsAndHash(map.entrySet(), pmap.entrySet()); UtilityTest.assertEqualsAndHash(pmap, IntTreePMap.from(pmap)); UtilityTest.assertEqualsAndHash(IntTreePMap.empty(), pmap.minusAll(pmap.keySet())); UtilityTest.assertEqualsAndHash(pmap, pmap.plusAll(pmap));