docs: public List<CRFCliqueTree> getCliqueTrees(String filename, DocumentReaderAndWriter<IN> readerAndWriter) {
      // only for the OCR data does this matter
      flags.ocrTrain = false;
  
      List<CRFCliqueTree> cts = new ArrayList<CRFCliqueTree>();
      ObjectBank<List<IN>> docs = makeObjectBankFromFile(filename, readerAndWriter);
      for (List<IN> doc : docs) {
        cts.add(getCliqueTree(doc));
      }
  
      return cts;
    }