@Override
 protected void readInternal(ObjectDataInput in) throws IOException {
   super.readInternal(in);
   lockOwner = in.readUTF();
   lockThreadId = in.readLong();
 }
 protected void readInternal(ObjectDataInput in) throws IOException {
   super.readInternal(in);
   unlockKey = in.readBoolean();
 }
 @Override
 protected void writeInternal(ObjectDataOutput out) throws IOException {
   super.writeInternal(out);
   out.writeUTF(lockOwner);
   out.writeLong(lockThreadId);
 }
 protected void writeInternal(ObjectDataOutput out) throws IOException {
   super.writeInternal(out);
   out.writeBoolean(unlockKey);
 }