void ItemInventoryChange ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & LocalUserId, const [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & ItemsToAdd, const [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & ItemsToRemove, [FOnItemInventoryChangeComplete](API\Plugins\OnlineSubsystem\Interfaces\FOnItemInventoryChangeComplete) CompletionDelegate )