@Override
    public void toData(DataOutput out) throws IOException {
      DataSerializer.writeString(ticker, out);
      out.writeInt(price);
      out.writeLong(timeStamp);
    }
Defines an action to be run after the specified operation is invoked by Geode callbacks.
geode-cq/src/distributedTest/java/org/apache/geode/internal/cache/PutAllClientServerDistributedTest.java