/// <summary>
/// Registers all discovered <see cref="ClusterKind"/> on the <see cref="ActorSystem"/> <see cref="Cluster"/>.
/// </summary>
/// <param name="config">The <see cref="ClusterConfig"/>.</param>
/// <param name="provider">The <see cref="IServiceProvider"/>.</param>
/// <returns>The modified <see cref="ClusterConfig"/>.</returns>
public static ClusterConfig WithDiscoveredClusterKinds(this ClusterConfig config, IServiceProvider provider)
=> config.WithClusterKinds(
provider.GetRequiredService <IEnumerable <GrainAndActor> >()
.Select(_ => new ClusterKind(_.Kind, CreatePropsFor(_, provider)))
.ToArray());