@Override
    public K getKey() {
        if (keyObject == null) {
            keyObject = serializationService.toObject(keyData);
        }
        return keyObject;
    }
@Override
    @Test
    public void getKey_caching() {
        QueryableEntry entry = createEntry("key", "value");

        assertSame(entry.getKey(), entry.getKey());
    }