code: public static <K> void store(Configuration conf, K item, String keyName)
    throws IOException {
  
      DefaultStringifier<K> stringifier = new DefaultStringifier<K>(conf,
          GenericsUtil.getClass(item));
      conf.set(keyName, stringifier.toString(item));
      stringifier.close();
    }
docs: Stores the item in the configuration with the given keyName.
  
  @param <K>  the class of the item
  @param conf the configuration to store
  @param item the object to be stored
  @param keyName the name of the key to use
  @throws IOException : forwards Exceptions from the underlying
  {@link Serialization} classes.