code: public static void dump(DataSet data, File outputFile) {
      try (Log log = Log.create(outputFile)) {
        log.write(CallInfo.create(), data);
      } 
    }
docs: Dump the contents of a data set (output file variant).
  
  <p>
  The output file will be GZIP-compressed if it has a <code>.gz</code> extension.
  </p>
  
  @param data Data set.
  @param outputFile Output file.