Sub groups in left panel

Hi to everyone!

I was wondering if there is any way to configure sub groups in the left panel of the Power BI Service. Example: If I create a group named "Sales", assign to it sub groups of sales, like "Sales by Country", "Sales by Manager", and so on. And every sub group if its own dashboards.

I've been checking it and didn't find any way. But in case somebody knows, I prefer to ask.

Thanks in advance.