@Override
  public void fromData(DataInput in,
      DeserializationContext context) throws IOException, ClassNotFoundException {
    super.fromData(in, context);
    action = DataSerializer.readObject(in);
    key = DataSerializer.readObject(in);
  }
A message that is sent to a particular distribution manager to let it know that the sender is an
administation console that just connected.
geode-core/src/main/java/org/apache/geode/internal/admin/remote/DestroyEntryMessage.java