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