Custom energy types on SimpleEnergyItem #30

Hello,

I was wondering if there's a way to have SimpleEnergyItems be unregistered from the "default" energy type? Currently, I have two energy items that are extended from a class that implements SimpleEnergyItem (and other behaviors that are not relevant to the issue).
All is dandy for the first item, since it is meant to use the default energy type. However, for the second, it's meant to use a custom energy type; I registered it manually to it - however, it's still registered to the default type (as all items that implement SimpleEnergyItem do), essentially allowing unintended 1:1 energy transferral.

Even if unregistering is an option, It'd be nice to have custom energy types support, since I wouldn't consider having what's essentially the same logic registered to other id enough to deem it complex/advanced to warrant having to use EnergyStorage.ITEM directly.

EDIT: Not long after I posted this, I found out I just had to register an empty EnergyStorage for the default type and it'd work 😅 Hopefully the request for built-in support, thus requiring no additional setup, is worth keeping the issue open.