public static ICompositeApplicationBuilder UseParallelInitialization([NotNull] this ICompositeApplicationBuilder builder)
 => builder.CustomizeSettings(settings => settings.UseParallelInitialization = true);
 public static ICompositeApplicationBuilder UseSequentialExecution([NotNull] this ICompositeApplicationBuilder builder)
 => builder.CustomizeSettings(settings => settings.UseParallelExecution = false);