protected Part getSecurityPart() {
    if (serverConnection != null) {
      // look types right put get etc
      return serverConnection.updateAndGetSecurityPart();
    }
    return null;
  }
Adds a new part to this message that may contain a serialized object.
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/Message.java