[FHandle](API\Runtime\AdvancedWidgets\Widgets\PropertyViewer\SPropertyViewer\FHandle) AddInstance ( const [UScriptStruct](API\Runtime\CoreUObject\UObject\UScriptStruct) * Struct, void * Data, [TOptional](API\Runtime\Core\IO\TOptional)< [FText](API\Runtime\Core\Internationalization\FText) > DisplayName )