docs: public static Map<String, String> getMetadataFromSequenceFile(FileSystem fs, Path path) {
          try {
              Configuration conf = new Configuration();
              conf.setInt("io.file.buffer.size", 4096);
              SequenceFile.Reader reader = new SequenceFile.Reader(fs, path, new Configuration());
              SequenceFile.Metadata meta = reader.getMetadata();
              reader.close();
              TreeMap<Text, Text> map = meta.getMetadata();
              Map<String, String> values = new HashMap<String, String>();
              for(Map.Entry<Text, Text> entry: map.entrySet())
                  values.put(entry.getKey().toString(), entry.getValue().toString());
  
              return values;
          } catch(IOException e) {
              throw new RuntimeException(e);
          }
      }