Having trouble organizing files under categories or topics

[GxnxrxlMasri]

I looked around online and tried different approaches but I didn't find anything helpful. as you see in the image provided the list in the sidebar are named in a chaotic way where they inherit the folder's name. where files in core/models/error/file.dart are named exactly like that.

How can put them under Core and when I click that I find Models, Repositories, Enums and when I click each link I find the files? is it possible to organize them just like they are organized in the file system under different folders?

like this:

[srawlins]

How can put them under Core and when I click that I find Models, Repositories, Enums and when I click each link I find the files? is it possible to organize them just like they are organized in the file system under different folders?

This is not possible.