anchor.diff:      final Option<Version> releaseVersionOpt = await _getReleaseVersion(
           currentProjectVersions, autoUpdateHostedVersions, type);
   
  -    return new ProjectReleaseVersions(currentProjectVersions, releaseVersionOpt);
  +    return new ProjectReleaseVersions(
  +        currentProjectVersions, releaseVersionOpt);
     }
   
     Future<Option<Version>> _getReleaseVersion(ProjectVersions currentVersions,
  
positive.code:   final ProjectVersions currentVersions;
    final Option<Version> newReleaseVersion;
  
    @override
    Version get pubspecVersion => currentVersions.pubspecVersion;
  
  
negative.code:   bool get hasBeenPublished => currentVersions.hasBeenPublished;
  
    bool get newReleaseRequired => newReleaseVersion is Some;
  }
  