public Task <ServiceIndexResponse> GetAsync(CancellationToken cancellationToken = default)
{
var resources = new List <ServiceIndexItem>();
resources.AddRange(BuildResource("PackagePublish", _url.GetPackagePublishResourceUrl(), "2.0.0"));
resources.AddRange(BuildResource("SymbolPackagePublish", _url.GetSymbolPublishResourceUrl(), "4.9.0"));
resources.AddRange(BuildResource("SearchQueryService", _url.GetSearchResourceUrl(), "", "3.0.0-beta", "3.0.0-rc"));
resources.AddRange(BuildResource("RegistrationsBaseUrl", _url.GetPackageMetadataResourceUrl(), "", "3.0.0-rc", "3.0.0-beta"));
resources.AddRange(BuildResource("PackageBaseAddress", _url.GetPackageContentResourceUrl(), "3.0.0"));
resources.AddRange(BuildResource("SearchAutocompleteService", _url.GetAutocompleteResourceUrl(), "", "3.0.0-rc", "3.0.0-beta"));
var result = new ServiceIndexResponse(new NuGetVersion("3.0.0"), resources);
return(Task.FromResult(result));
}