public static FubuApplication Autofac(this IContainerFacilityExpression expression)
 {
     return expression.Autofac(
         () =>
         {
             var builder = new ContainerBuilder();
             return builder.Build();
         });
 }
 public static FubuApplication Autofac(this IContainerFacilityExpression expression, IComponentContext context)
 {
     return expression.Autofac(() => context);
 }