@Override
    public void process(DistributionMessage msg) {
      try {
        if (msg instanceof FetchEntryReplyMessage) {
          FetchEntryReplyMessage reply = (FetchEntryReplyMessage) msg;
          returnValue = reply.getValue();
          if (logger.isTraceEnabled(LogMarker.DM_VERBOSE)) {
            logger.trace(LogMarker.DM_VERBOSE, "FetchEntryResponse return value is {}",
                returnValue);
          }
        }
      } finally {
        super.process(msg);
      }
    }
A processor to capture the value returned by {@link FetchEntryMessage.FetchEntryReplyMessage}
geode-core/src/main/java/org/apache/geode/internal/cache/partitioned/FetchEntryMessage.java