DECLARE_DYNAMIC_DELEGATE(FOnSomethingHappenedSignature);


UFUNCTION(BlueprintCallable)
void DoSomething(const FOnSomethingHappenedSignature& OnSomethingHappened)
{
    AsyncTask(ENamedThreads::AnyThread, [OnSomethingHappened]()
    {
        OnSomethingHappened.ExecuteIfBound();
    };
}