public boolean processChunk(List objects, InternalDistributedMember sender, int sequenceNum,
      boolean lastInSequence) {
    return processData(objects, sender, sequenceNum, lastInSequence);
  }
Called from separate thread when reply is processed.

@return false if should abort (region was destroyed or cache was closed)
geode-core/src/main/java/org/apache/geode/distributed/internal/streaming/StreamingOperation.java