@Override
 public void writeTo(StreamOutput out) throws IOException {
   super.writeTo(out);
   out.writeOptionalString(stateInformation);
 }
 @Override
 public void writeTo(StreamOutput out) throws IOException {
   super.writeTo(out);
   out.writeBoolean(spaceFound);
   out.writeOptionalString(reindexedSpaces);
 }
 @Override
 public void readFrom(StreamInput in) throws IOException {
   super.readFrom(in);
   stateInformation = in.readOptionalString();
 }
 @Override
 public void readFrom(StreamInput in) throws IOException {
   super.readFrom(in);
   spaceFound = in.readBoolean();
   reindexedSpaces = in.readOptionalString();
 }