public GridOptions DefaultGridOptions {get;}

{
    QueuedTask.Run(() =>
    {
        var gridOptions = GridOptionsEnvironment.Instance.DefaultGridOptions;
    });
}

{
    QueuedTask.Run(() =>
    {
        if (GridOptionsEnvironment.Instance.HasGridOptions(map))
        {
            //set back to defaults - will overwrite existing
            GridOptionsEnvironment.Instance.SetGridOptions(map, 
                GridOptionsEnvironment.Instance.DefaultGridOptions);
        }
    });
}