code: public static <T> HiddenField<T> newHiddenField(final String id)
  	{
  		final HiddenField<T> hiddenField = new HiddenField<>(id);
  		hiddenField.setOutputMarkupId(true);
  		return hiddenField;
  	}
docs: Factory method for create a new {@link HiddenField}.
  
  @param <T>
  the generic type of the model
  @param id
  the id
  @return the new {@link HiddenField}.