anchor.diff:  
     // Converts device orientation to w3c OrientationLockType enum.
     static String? _deviceOrientationToLockType(String deviceOrientation) {
  -    switch(deviceOrientation) {
  +    switch (deviceOrientation) {
         case 'DeviceOrientation.portraitUp':
           return orientationLockTypePortraitPrimary;
         case 'DeviceOrientation.landscapeLeft':
  
positive.code:   static const String orientationLockTypeLandscape = 'landscape';
    static const String orientationLockTypePortrait = 'portrait';
    static const String orientationLockTypePortraitPrimary = 'portrait-primary';
    static const String orientationLockTypePortraitSecondary = 'portrait-secondary';
    static const String orientationLockTypeLandscapePrimary = 'landscape-primary';
    static const String orientationLockTypeLandscapeSecondary = 'landscape-secondary';
  
    /// Sets preferred screen orientation.
    ///
  
negative.code:     // This css prevents an autofill overlay brought by the browser during
      // text field autofill by delaying the transition effect.
      // See: https://github.com/flutter/flutter/issues/61132.
      if (browserHasAutofillOverlay()) {
        sheet.insertRule('''
  .transparentTextEditing:-webkit-autofill,
  .transparentTextEditing:-webkit-autofill:hover,
  .transparentTextEditing:-webkit-autofill:focus,
  