public PackageGroup(string postfix)
            {
                var className = $"PackageVersions{postfix}";

                var outputPackageVersionsPropsFilename = Path.Combine(_solutionDirectory, $"PackageVersions{postfix}.g.props");

                var outputPackageVersionsXunitFilename = Path.Combine(
                    _baseXunitPath,
                    $"PackageVersions{postfix}.g.cs");

                _msBuildPropsFileGenerator = new MSBuildPropsFileGenerator(outputPackageVersionsPropsFilename);

                _xUnitFileGenerator = new XUnitFileGenerator(outputPackageVersionsXunitFilename, className);
            }