anchor.diff:  
     Timeouts._(driver) : super(driver, 'timeouts');
   
  -  _set(String type, Duration duration) =>
  +  void _set(String type, Duration duration) =>
         _post('', {'type': type, 'ms': duration.inMilliseconds});
   
     /// Get the script timeout.
  
positive.code:   /// Set the implicit timeout.
    set implicitWaitTimeout(Duration duration) {
      _set('implicit', duration);
      return _implicitWaitTimeout = duration;
    }
  
    /// Get the page load timeout.
  
negative.code:   /// Set the script timeout.
    set scriptTimeout(Duration duration) {
      _set('script', duration);
      _scriptTimeout = duration;
    }
  
    /// Get the implicit timeout.
  