[Pharo-users] What should I name my nested packages?

Hello, Just a quick question as I work on refactoring and cleaning up a project I've been working on. I notice that packages like Fuel appear in nice, nested hierarchies in my code browser, with 'Core' nested under 'Fuel' even though 'Core's package name is actually Fuel-Core. I'm wondering what I have to do to get my own packages to nest similarly in the code browser beyond just naming them accordingly. Thank you, Evan