code: function(appConfig, html) {
  
  		// apply APP_CONTAINER class and AppID
  		html = _outerHtml(jQuery(html).addClass(F2.Constants.Css.APP_CONTAINER + ' ' + appConfig.appId));
  
  		// optionally apply wrapper html
  		if (_config.appRender) {
  			html = _config.appRender(appConfig, html);
  		}
  
  		return _outerHtml(html);
  	}
docs: Renders the html for an app.
  @method _appRender
  @deprecated This has been replaced with {{#crossLink "F2.AppHandlers"}}{{/crossLink}} and will be removed in v2.0
  @private
  @param {F2.AppConfig} appConfig The F2.AppConfig object
  @param {string} html The string of html