void CreateViewModel()
		{
			options = new TestablePackageManagementOptions();
			options.PackageSources.Clear();
			fakeFolderBrowser = new FakeFolderBrowser();
			viewModel = new RegisteredPackageSourcesViewModel(options, fakeFolderBrowser);
		}
 void CreateViewModel()
 {
     var options = new TestablePackageManagementOptions();
     packageSources = options.PackageSources;
     var cache = new FakePackageRepositoryFactory();
     registeredRepositories = new RegisteredPackageRepositories(cache, options);
     packageSources.Clear();
     fakeFolderBrowser = new FakeFolderBrowser();
     viewModel = new RegisteredPackageSourcesViewModel(registeredRepositories, fakeFolderBrowser);
 }