参考错误:“UrlShortener”未定义

我正在尝试以下代码:

  function onOpen() {

SpreadsheetApp.getUi()

.createMenu("Shorten")

.addItem("Go !!","rangeShort")

 .addToUi()  
}

function rangeShort() {

  var range = SpreadsheetApp.getActiveRange(), data = range.getValues();

var output = [];

 for(var i = 0, iLen = data.length; i < iLen; i++) {

 var url = UrlShortener.Url.insert({longUrl: data[i][0]});

 output.push([url.id]);

}

range.offset(0,1).setValues(output);

}

但它有一个错误: