public void Init(IEnumerable <File> files)
        {
            var folderList = new List <GFolder>();
            var fileList   = new List <GFile>();

            foreach (var file in files)
            {
                if (MimeTypes.IsGoogleFolder(file.MimeType))
                {
                    folderList.Add(new GFolder(file));
                }
                else
                {
                    fileList.Add(new GFile(file));
                }
            }

            TriageFolders(folderList);
            TriageFiles(fileList, folderList);

            this.Folders = new ObservableCollection <GFolder>(folderList.Where(a => a.GParent == null));
            this.Files   = new ObservableCollection <GFile>(fileList.Where(a => a.GParent == null));

            OnPropertyChanged(nameof(Folders));
            OnPropertyChanged(nameof(Files));
            OnPropertyChanged(nameof(Items));
        }