private async Task TryGetSubFolders(bool withSecond)
{
if (_isLoading || _isLoaded)
{
return;
}
_isLoading = true;
var subFolders = await CurrentFolder.GetFoldersAsync();
SubFolders.AddAll(subFolders.Select(it => new TreeViewItemModel(it, withSecond)));
_isLoaded = true;
_isLoading = false;
}