@Override
      public boolean hasNext() {
        return putAllDataSize > position;
      }
In the originating cache, this returns an iterator on the list of events caused by the putAll
operation. This is cached for listener notification purposes. The iterator is guaranteed to
return events in the order they are present in putAllData[]
geode-core/src/main/java/org/apache/geode/internal/cache/DistributedPutAllOperation.java