code: public void classifyAndWriteAnswers(String testFile,
                                        DocumentReaderAndWriter<IN> readerWriter)
      throws IOException
    {
      ObjectBank<List<IN>> documents =
        makeObjectBankFromFile(testFile, readerWriter);
      classifyAndWriteAnswers(documents, readerWriter);
    }
docs: Load a test file, run the classifier on it, and then print the answers to
  stdout (with timing to stderr). This uses the value of flags.documentReader
  to determine testFile format.
  
  @param testFile The file to test on.
  @param readerWriter A reader and writer to use for the output