typedef [TTypePromoter](API\Plugins\MetasoundGraphCore\TTypePromoter)< bPromotThisArgType, ThisArgType, typename [TDataTypeVariantFallbackHelper](API\Plugins\MetasoundGraphCore\TDataTypeVariantFallbackHelper)< [DataType](API\Plugins\OptimusCore\DataType), VariantArgTypes... >::[FallbackType](API\Plugins\MetasoundGraphCore\TDataTypeVariantFallbackHelper\FallbackType) > FVariantPromoter