@Override
  protected void toString(StringBuilder sb) {
    super.toString(sb);

    sb.append(", timeout=").append(getWaitTimeout());
    sb.append(", thread=").append(getThreadId());
  }
 @Override
 protected void readInternal(ObjectDataInput in) throws IOException {
   super.readInternal(in);
   ownerUuid = in.readUTF();
 }
 @Override
 protected void writeInternal(ObjectDataOutput out) throws IOException {
   super.writeInternal(out);
   out.writeUTF(ownerUuid);
 }