void InitializeFromExisting ( const [FAssetDataMap](API\Runtime\AssetRegistry\AssetRegistry\FAssetRegistryState\FAssetDataMap) & AssetDataMap, const [TMap](API\Runtime\Core\Containers\TMap)< [FAssetIdentifier](API\Runtime\CoreUObject\AssetRegistry\FAssetIdentifier), FDependsNode * > & DependsNodeMap, const [TMap](API\Runtime\Core\Containers\TMap)< [FName](API\Runtime\Core\UObject\FName), [FAssetPackageData](API\Runtime\CoreUObject\AssetRegistry\FAssetPackageData) * > & AssetPackageDataMap, const [FAssetRegistrySerializationOptions](API\Runtime\AssetRegistry\AssetRegistry\FAssetRegistrySerializationOptio-) & Options, [EInitializationMode](API\Runtime\AssetRegistry\AssetRegistry\FAssetRegistryState\EInitializationMode) InitializationMode )