static bool GenerateDiffMap ( const [FPackageData](API\Runtime\CoreUObject\Serialization\FArchiveStackTraceWriter\FPackageData) & SourcePackage, const [FPackageData](API\Runtime\CoreUObject\Serialization\FArchiveStackTraceWriter\FPackageData) & DestPackage, const [FArchiveCallstacks](API\Runtime\CoreUObject\Serialization\FArchiveCallstacks) & Callstacks, int32 MaxDiffsToFind, [FArchiveDiffMap](API\Runtime\CoreUObject\Serialization\FArchiveDiffMap) & OutDiffMap )