@Override
  public void fromData(DataInput in,
      DeserializationContext context) throws IOException, ClassNotFoundException {
    requestId = in.readInt();
    target = context.getDeserializer().readObject(in);
  }
If no response is desired the requestId can be reset by invoking this method
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/messages/HeartbeatRequestMessage.java