code: public static Classifier consume(File file) throws PMMLConversionException {
          PMML pmml = null;
          try {
              if (isGzipped(file)) {
                  logger.debug("Consuming GZipped PMML file '{}'.", file.getAbsolutePath());
  
                  try (FileInputStream fis = new FileInputStream(file);
                       GZIPInputStream gzipInputStream = new GZIPInputStream(fis))
                  {
                      pmml = JAXBUtil.unmarshalPMML(new StreamSource(gzipInputStream));
                  }
              } else {
                  logger.debug("Consuming PMML file '{}'.", file.getAbsolutePath());
  
                  try (FileInputStream fis = new FileInputStream(file)) {
                      pmml = JAXBUtil.unmarshalPMML(new StreamSource(fis));
                  }
              }
          } catch (Exception e) {
              throw new PMMLConversionException("Failed to unmarshal PMML file '" + file + "'. Make sure the file is a valid PMML.", e);
          }
  
          Algorithm algorithm = getAlgorithm(pmml);
  
          logger.debug("Consumed PMML file using algorithm {}.", algorithm);
  
          return algorithm.getPMMLConsumer().consume(pmml);
      }
docs: Consumes the PMML in the given file and converts it to a Weka {@link Classifier}.
  
  @param file The file with the PMML representation of the classifier.
  @return A Weka {@link Classifier}.
  @throws PMMLConversionException If if fails to consume the PMML file.