code: protected final void addConverter(String name, String converterId)
      {
          _factories.put(name, new ConverterHandlerFactory(converterId));
      }
docs: Add a ConvertHandler for the specified converterId
  
  @see javax.faces.view.facelets.ConverterHandler
  @see javax.faces.application.Application#createConverter(java.lang.String)
  @param name
  name to use, "foo" would be &lt;my:foo />
  @param converterId
  id to pass to Application instance