anchor.diff:     * Sends an Exception hit to Google Analytics. [description] is the exception
      * description (up to 100 chars), and [fatal] indicates whether the exception
      * was fatal.
  +   *
  +   * *Warning:* Do not send the exception message to Google Analytics as it
  +   * may contain personally identifiable information.
      */
     void sendException([String description, bool fatal]) {
       _proxy.callMethod('sendException', [description, fatal]);
  
positive.code: /**
   * A library to use Google Analytics with Chrome Apps. This is a wrapper around
   * the
   * [chrome-platform-analytics](https://github.com/GoogleChrome/chrome-platform-analytics/wiki).
   * JavaScript library.
   *
   * Example use:
  
negative.code:  * Returns a service instance for the named Chrome Platform App. Generally
   * you'll only ever want to call this with a single name that identifies the
   * host Chrome Platform App/Extension or extension using the library. This name
   * is used to scope hits to your app on Google Analytics.
   */
  Future<GoogleAnalytics> getService(String appName) {
    if (_serviceMap[appName] != null) {
  