void ComputePackageDifferences ( const [FComputeDifferenceOptions](API\Editor\UnrealEd\Commandlets\FAssetRegistryGenerator\FComputeDifferenceOptions) & Options, const [FAssetRegistryState](API\Runtime\AssetRegistry\AssetRegistry\FAssetRegistryState) & PreviousState, [FAssetRegistryDifference](API\Editor\UnrealEd\Commandlets\FAssetRegistryGenerator\FAssetRegistryDifference) & OutDifference )