Get TSubclassOf back from spawned object

UPROPERTY(EditDefaultsOnly, Category = Item)
TSubclassOf TestItemClass;

class ATestItem* item = GetWorld()->SpawnActor(TestItemClass);

how to get TSubclassOf from spawne object “item”?

TSubclassOf BackItemToClass = ???(item);

TestItemClass should be equal to BackItemToClass in the end.

TSubclassOf< AWhateverBase > BackItemToClass = item->GetClass();