anchor.diff:    name: 'beta-quality support for desktop on macOS',
     configSetting: 'enable-macos-desktop',
     environmentOverride: 'FLUTTER_MACOS',
  -  extraHelpText: flutterNext ?
  -      'Newer beta versions are available on the beta channel.' : null,
  -  master: FeatureChannelSetting(
  -    available: true,
  -    enabledByDefault: false,
  -  ),
  -  dev: FeatureChannelSetting(
  -    available: true,
  -    enabledByDefault: false,
  -  ),
  -  beta: FeatureChannelSetting(
  -    available: flutterNext,
  -    enabledByDefault: false,
  -  ),
  -  stable: FeatureChannelSetting(
  -    available: flutterNext,
  +  extraHelpText: 'Newer beta versions are available on the beta channel.',
  +  master: FeatureChannelSetting(
  +    available: true,
  +    enabledByDefault: false,
  +  ),
  +  dev: FeatureChannelSetting(
  +    available: true,
  +    enabledByDefault: false,
  +  ),
  +  beta: FeatureChannelSetting(
  +    available: true,
  +    enabledByDefault: false,
  +  ),
  +  stable: FeatureChannelSetting(
  +    available: true,
       enabledByDefault: false,
     ),
   );
  
positive.code:   name: 'beta-quality support for desktop on Windows',
    configSetting: 'enable-windows-desktop',
    environmentOverride: 'FLUTTER_WINDOWS',
    extraHelpText: flutterNext ?
        'Newer beta versions are available on the beta channel.' : null,
    master: FeatureChannelSetting(
      available: true,
      enabledByDefault: false,
    ),
    dev: FeatureChannelSetting(
      available: true,
      enabledByDefault: false,
    ),
    beta: FeatureChannelSetting(
      available: flutterNext,
      enabledByDefault: false,
    ),
    stable: FeatureChannelSetting(
      available: flutterNext,
      enabledByDefault: false,
    ),
  );
  
negative.code:   name: 'beta-quality support for desktop on Linux',
    configSetting: 'enable-linux-desktop',
    environmentOverride: 'FLUTTER_LINUX',
    extraHelpText: 'Newer beta versions are available on the beta channel.',
    master: FeatureChannelSetting(
      available: true,
      enabledByDefault: false,
    ),
    dev: FeatureChannelSetting(
      available: true,
      enabledByDefault: false,
    ),
    beta: FeatureChannelSetting(
      available: true,
      enabledByDefault: false,
    ),
    stable: FeatureChannelSetting(
      available: true,
      enabledByDefault: false,
    ),
  );
  