docs: public void addConverter(int index, IConverter converter) {
  		converterList.add(index, converter);
  		if (converter instanceof IContainerConverter) {
  			IContainerConverter containerConverter = (IContainerConverter) converter;
  			if (containerConverter.getElementConverter() == null) {
  				containerConverter.setElementConverter(elementConverter);
  			}
  		}
  	}