Inherited TSubclassOf UProperty, Increasse class restriction for editor

Development Programming & Scripting
1

I want to create a Blueprintable UClass, with a TSubclassOf UProperty, but then create a Blueprintable subclass of this UClass, which imposes further restrictions of the class of the UProperty, and restrict the list displayed in the editor.

i.e.

UCLASS(Abstract, Blueprintable)
class UBase : public UObject
{
	GENERATED_BODY()

	UPROPERTY(EditDefaultsOnly)
	TSubclassOf<AActor> ActorType;
}

UCLASS()
class AAlphaActor : AActor
{
	GENERATED_BODY()
}

UCLASS(Blueprintable)
class UAlpha : UBase
{
	GENERATED_BODY()

	Alpha() 
	{
		// Enforce this in blueprints??
		ActorType = AAlphaActor::StaticClass();
	}
}

When I create a Blueprint of UAlpha, I want to be able to edit ActorType, but as if it were TSubclassOf rather than TSubclassOf.

As I understand the AllowedClasses meta value can be used with UClass* to restrict the types, is their a way to set this meta tag on the subclasses to achieve a similar restriction?

I also known I could use UObject::PostEditChangeProperty, to enforce this requirement, but this wouldn’t restrict the list displayed in editor.