@Override
    public IndexEntry next() {
      java.util.Map.Entry<Pair<CachedDeserializable, CachedDeserializable>, CachedDeserializable> next =
          iterator.next();
      return new IndexEntryImpl(next.getKey().getX(), next.getKey().getY(), next.getValue());
    }
A dummy implementation of an IndexMap. Keeps all of the entries in memory, but in serialized
form.
geode-core/src/main/java/org/apache/geode/internal/cache/persistence/query/mock/IndexMapImpl.java