Passing multiple custom fields to "clickMapObject" handler function

HTML

<script type="text/javascript" src="http://www.amcharts.com/lib/3/ammap.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/maps/js/worldLow.js"></script>
<script type="text/javascript" src="http://www.amcharts.com/lib/3/themes/none.js"></script>
<div id="chartdiv"></div>

CSS

body {
    padding: 10px;
}
#chartdiv {
	width	: 100%;
	height	: 500px;
}

JavaScript

var map = AmCharts.makeChart("chartdiv", {

	"type": "map",
    "theme": "none",
    "pathToImages": "http://www.amcharts.com/lib/3/images/",

	"dataProvider": {
     "map": "worldLow",
      "areas": [{ id: "US", custom1: "hello", custom2: "there" }]
	},
	"areasSettings": {
		"autoZoom": false,
		"selectedColor": "#CC0000"
	},
	"smallMap": {}
});

map.addListener("clickMapObject", function (event) {
    console.log(event.mapObject.custom1);
    console.log(event.mapObject.custom2);
});