UnityEditor.AssetServer.GetRootGUID C# (CSharp) Method

        public static extern string GetRootGUID();
        [MethodImpl(MethodImplOptions.InternalCall)]

 internal static IEnumerable <ExportPackageItem> GetAssetItemsForExport(ICollection <string> guids, bool includeDependencies)
 {
     if (guids.Count == 0)
     {
         string[] collection = new string[0];
         guids = new HashSet <string>(AssetServer.CollectAllChildren(AssetServer.GetRootGUID(), collection));
     }
     if (< > f__am$cache5 == null)
     {