void SetValue ( [PCGMetadataEntryKey](API\Plugins\PCG\Metadata\PCGMetadataEntryKey) ItemKey, const [FPCGMetadataAttributeBase](API\Plugins\PCG\Metadata\FPCGMetadataAttributeBase) * InAttributeA, [PCGMetadataEntryKey](API\Plugins\PCG\Metadata\PCGMetadataEntryKey) InEntryKeyA, const [FPCGMetadataAttributeBase](API\Plugins\PCG\Metadata\FPCGMetadataAttributeBase) * InAttributeB, [PCGMetadataEntryKey](API\Plugins\PCG\Metadata\PCGMetadataEntryKey) InEntryKeyB, [EPCGMetadataOp](API\Plugins\PCG\Metadata\EPCGMetadataOp) Op )