public static async ValueTask InvokeAllAsync <T>(this Func <IServiceProvider, T, ValueTask> handler, IServiceProvider services, T t)
{
if (handler == null)
{
return;
}
var list = handler.GetInvocationList().Cast <Func <IServiceProvider, T, ValueTask> >();
foreach (var func in list)
{
await func(services, t);
}
}