如何在google应用脚本中将字符串转换为UTF-16格式

function convertToUTF16(str) {
  var utf16String = "";
  for (var i = 0; i < str.length; i++) {
    var charCode = str.charCodeAt(i);
    utf16String += "\\u" + charCode.toString(16).padStart(4, "0");
  }
  return utf16String;
}

var inputString = "你好，世界！";
var utf16String = convertToUTF16(inputString);
Logger.log(utf16String);