@Override
      public boolean hasNext() {
        return removeAllDataSize > position;
      }
In the originating cache, this returns an iterator on the list of events caused by the
removeAll 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/DistributedRemoveAllOperation.java