assertEquals(false, sm.inverseBidiMap().containsKey(fromKeyValue));
assertEquals(false, sm.inverseBidiMap().containsValue(fromKey));
assertEquals(false, sub.containsKey(fromKey));
assertEquals(false, sub.containsValue(fromKeyValue));
assertEquals(false, sm.containsKey(first));
assertEquals(false, sm.containsValue(firstValue));
assertEquals(false, sm.inverseBidiMap().containsKey(firstValue));
assertEquals(false, sm.inverseBidiMap().containsValue(first));
assertEquals(false, sub.containsKey(first));
assertEquals(false, sub.containsValue(firstValue));